Anti-inflammatory effects Description Side Effects Drug Reactions
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Dexamethasone

Anti-inflammatory effects Description Side Effects Drug Reactions
Product Name
Dexamethasone
CAS No.
50-02-2
Chemical Name
Dexamethasone
Synonyms
DEXAMETHASONE BASE;DXM;DEXAMETHASON;Dexa;Dexametasona;DECADRON;HEXADECADROL;Dexamethazone;DexaMethasone-d4;DEXAMETHASONE CRYSTALLINE
CBNumber
CB4261243
Molecular Formula
C22H29FO5
Formula Weight
392.47
MOL File
50-02-2.mol
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Dexamethasone Property

Melting point:
262-264 °C (lit.)
alpha 
75 º (c=1, dioxane)
Boiling point:
568.2±50.0 °C(Predicted)
Density 
1.1283 (estimate)
refractive index 
76 ° (C=1, Dioxane)
Flash point:
9℃
storage temp. 
2-8°C
solubility 
ethanol: 1 mg/mL
form 
powder
pka
12.13±0.70(Predicted)
color 
off-white
Water Solubility 
10 mg/100 mL (25 ºC)
Sensitive 
Light Sensitive
Merck 
14,2943
BRN 
2066651
BCS Class
1 (CLogP), 3 (LogP)
Stability:
Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, acid anhydrides, acid chlorides. May be light sensitive.
InChIKey
UREBDLICKHMUKA-CXSFZGCWSA-N
CAS DataBase Reference
50-02-2(CAS DataBase Reference)
NIST Chemistry Reference
Prednisolone, 9alpha-fluoro-16alpha-methyl-(50-02-2)
EPA Substance Registry System
Dexamethasone (50-02-2)
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Safety

Hazard Codes 
Xi,Xn,T,F
Risk Statements 
43-40-36/37/38-20/21/22-42/43-39/23/24/25-23/24/25-11
Safety Statements 
36/37-45-36-26-22-16
RIDADR 
UN1230 - class 3 - PG 2 - Methanol, solution
WGK Germany 
2
RTECS 
TU3980000
TSCA 
Yes
HS Code 
29372210
Hazardous Substances Data
50-02-2(Hazardous Substances Data)
Toxicity
LD50 oral in rat: > 3gm/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Precautionary statements

P201Obtain special instructions before use.

P202Do not handle until all safety precautions have been read and understood.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P308+P313IF exposed or concerned: Get medical advice/attention.

P405Store locked up.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
Y0001593
Product name
Dexamethasone for peak identification
Purity
European Pharmacopoeia (EP) Reference Standard
Packaging
Y0001593
Price
$220
Updated
2024/03/01
Sigma-Aldrich
Product number
Y0001177
Product name
Dexamethasone for system suitability
Purity
European Pharmacopoeia (EP) Reference Standard
Packaging
Y0001177
Price
$220
Updated
2024/03/01
Sigma-Aldrich
Product number
D1756
Product name
Dexamethasone
Purity
≥98% (HPLC), powder
Packaging
25mg
Price
$36.2
Updated
2024/03/01
Sigma-Aldrich
Product number
D2915
Product name
Dexamethasone-Water Soluble
Purity
suitable for cell culture, BioReagent
Packaging
100MG
Price
$192
Updated
2024/03/01
Sigma-Aldrich
Product number
D-085
Product name
Dexamethasone solution
Purity
1.0?mg/mLinmethanol,ampuleof1?mL,certifiedreferencematerial,Cerilliant?
Packaging
1mL
Price
$87
Updated
2024/03/01
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Dexamethasone Chemical Properties,Usage,Production

Anti-inflammatory effects

Dexamethasone reduces and prevents the tissue response to inflammation, thereby reducing the manifestations of inflammation. Hormones inhibit the accumulation of inflammatory cells, including macrophages and leukocytes, at sites of inflammation, and inhibit phagocytosis, the release of lysosomal enzymes, and the synthesis and release of inflammatory chemical mediators.

Description

Dexamethasone is an Anti-inflammatory glucocorticoid that is used to treat inflammatory and autoimmune conditions such as rheumatoid arthritis and bronchospasm. It is useful to study apoptosis, cell signaling pathways and gene expression. It is associated with marbofloxacin and clotrimazole and finds application in veterinary medicine to treat difficult ear infections in dogs. It is also used to treat horses with swelling of of distal limbs and general bruising in combination with trichlormethiazide.
Dexamethasone induces the production of phospholipase A2 inhibitory protein (lipocortin). It also inhibits induction of nitric oxide synthase (IC50=5 nM). Dexamethasone has been shown to cause reduction in cyclin A and Cd k2 activity, inhibition of G1/S transition in osteoblasts and inhibition of phosphorylation of Rb protein in vitro. Dexamethasone has been observed to induce apoptosis in human thymocytes and eosinophils, but inhibits apoptosis in neutrophils in vitro. Dexamethasone is an activator of IDO.
Dexamethasone Inhibits the expression of the inducible but not the constitutive nitric oxide synthase in vascular endothelial cells (IC50=5 nM). Dexamethasone regulates T cell survival, growth, and differentiation.Enhances active cation transport in aortic smooth muscle cells by stimulating the Na+-K+ pump. Has anti-inflammatory and anti-rheumatic properties. Induces apoptosis in human thymocytes. In general, 500-1000 nM of dexamethasone is sufficient to induce apoptosis following a 6-hour incubation at 37°C.

Side Effects

Dexamethasone is a artificially synthetic glucocorticoid, belonging to a long-term glucocorticoid drugs. Glucocorticoids can promote the metabolism of the three major nutrients while preventing protein synthesis with long-term topical being able to causing more serious consequences. However, the adverse effects should be much smaller than oral medication. Common side effects of systemic corticosteroid include:
It can cause stomach discomfort and increased sensitivity to stomach ulcers.
It can Increase the appetite and results in a significant increase in body weight.
Potential patients with diabetes: glucose intolerance in patients with aggravating existing diabetes.
It can cause mental illness including personality changes, irritability, agitation, and mania.
It can be used for the long-term treatment of osteoporosis: pathological fractures (such as hip).
It can cause elevated liver enzymes, fatty liver degeneration (usually reversible).
For patients of nephrotic syndrome, applying long-term high-dose medication is likely to cause large side effects such as gastrointestinal ulcers and avascular necrosis. For treatment of nephrotic syndrome, it is better to apply prednisone acetate tablets.
Dexamethasone can be used for the treatment of high altitude cerebral edema and pulmonary edema. Upon climbing expeditions, people can apply it to alleviate altitude sickness.
Combination with marbofloxacin and clotrimazole, etc. can be used for treating the ear infection and allergies of a dog or a bird.
The above information is edited by the chemicalbook of Dai Xiongfeng.

Drug Reactions

Dexamethasone is a corticosteroid known as a glucocorticoid. Corticosteroids are meant to resemble a naturally occurring hormone produced in the adrenal cortex, cortisol. Corticosteroids act on the immune system by blocking the production of substances that trigger inflammatory and immune responses.
Dexamethasone may react with these drugs:
Amphotericin
Aspirin
Cyclophosphamide
Cyclosporine
Digoxin
Daunorubicin HCl
Doxorubicin HCl
Insulin
Mitotane
Phenobarbital
Phenytoin sodium
Rifampin
Rimadyl

Description

The activity of dexamethasone, as measured by glycogen deposition, is 20 times greater than that of hydrocortisone. It has five times the anti-inflammatory activity of prednisolone. Clinical data indicate that this compound has seven times the antirheumatic potency of prednisolone. It is roughly 30 times more potent than hydrocortisone. Its pharmacokinetics are presented in Table 33.3. Routes of metabolism for dexamethasone are similar to those for prednisolone, with its primary 6β-hydroxy metabolite being recovered in urine. Dexamethasone sodium phosphate is the water-soluble sodium salt of the 21-phosphate ester, with an IV half-life of less than 10 minutes because of rapid hydrolysis by plasma phosphatases. Peak plasma levels for dexamethasone usually are attained in approximately 10 to 20 minutes following its IV administered dose. A similar reaction occurs when the phosphate ester is applied topically or by inhalation.

Chemical Properties

White or almost white, crystalline powder.

Originator

Dexacen,Central,US,1977

Uses

Dexamethasone is used for the same indications as all corticosteroids; however, it exhibits a significantly more powerful anti-inflammatory and anti-allergic action. It is used for circulatory collapse—shock during or after surgical operations, trauma, blood loss, myocardial infarction, and burns. It is also used in severe infections—toxemia, vascular collapse in meningococcosis, septicemia, diphtheria, typhoid fever, and peritonitis. It is used in severe allergic conditions—asthmatic status, laryngeal edema, severe anaphylactic reactions to medicinal drugs, and pyrogenic reactions.

Uses

Anti-inflammatory glucocorticoidDexamethasone is used to treat inflammatory and autoimmune conditions such as rheumatoid arthritis and bronchospasm. It is useful to study apoptosis, cell signaling pathways and gene expression. It is associated with marbofloxacin and clotrimazole and finds application in veterinary medicine to treat difficult ear infections in dogs. It is also used to treat horses with swelling of of distal limbs and general bruising in combination with trichlormethiazide. It is also an anti-inflammatory glucocorticoid.

Indications

Cushing’s disease is defined as hypercortisolism due to chronic overproduction of corticotrophin by a corticotroph adenoma. Cortisol’s lack of suppressibility during the administration of low doses of dexamethasone but suppressibility during high-dose dexamethasone is the key diagnostic finding in 99% of the patients with Cushing’s disease. This contrasts with the lack of glucocorticoid suppressibility typically found in patients with corticotrophin-independent hypercortisolism (Cushing’s syndrome). A judicious selection of the available tests may be necessary to obtain an accurate diagnosis in patients with Cushing’s syndrome.

Definition

ChEBI: Dexamethasone is a fluorinated steroid that is 9-fluoropregna-1,4-diene substituted by hydroxy groups at positions 11, 17 and 21, a methyl group at position 16 and oxo groups at positions 3 and 20. It is a synthetic member of the class of glucocorticoids. It has a role as an adrenergic agent, an antiemetic, an antineoplastic agent, an environmental contaminant, a xenobiotic, an immunosuppressive agent and an anti-inflammatory drug. It is a fluorinated steroid, a 3-oxo-Delta(1),Delta(4)-steroid, a glucocorticoid, a 20-oxo steroid, an 11beta-hydroxy steroid, a 17alpha-hydroxy steroid and a 21-hydroxy steroid. It derives from a hydride of a pregnane.

Manufacturing Process

The preparation of dexamethasone acetate is described in US Patent 3,007,923 as follows. 1.5 cc of dimethylformamide and 1.5 cc of anhydrous hydrofluoric acid are admixed and treated with 480 mg of 9β,11β-epoxy-17αhydroxy-21-acetoxy-16α-methyl-?1,4-pregnadiene-3,20-dione (prepared according to E.P. Oliveto et al, J. Am. Chem. Soc., 80, 44331, 1958). The steroid dissolves in about 15 minutes. The reaction mixture is shaken for two hours at a temperature between 0 and +5°C, and then poured into 75 cc of
water containing in suspension, 7.5 grams of sodium bicarbonate. The mixture is vacuum filtered, the filter cake washed and then dried at 100°C, yielding 460 mg of crude hexadecadrol contaminated with a small amount of the starting material. A single recrystallization from methylene chloride yields 370 mg of the pure product having a melting point of 170°C and 229°C. The mother liquor yields 62 mg of the starting material, and a remainder constituting a mixture of starting and final materials with little other contamination.

brand name

Aeroseb-Dex (Allergan); Decadron (Merck); Dexone (Solvay Pharmaceuticals); Hexadrol (Organon); Maxidex (Alcon); Mymethasone (Morton Grove).

Therapeutic Function

9-Fluoro-11β,17-dihydroxy-21-acetoxy-16α-methylpregna1,4-diene-3,20-dione

General Description

Dexamethasone, 9-fluoro-11β,17,21-trihydroxy-16α-methylpregna-1,4-diene-3,20-dione,is the 16 -isomer of betamethasone.
Dexamethasone acetate, USP (21-acetate)
Dexamethasone sodium phosphate, USP (21-sodiumphosphate).

General Description

Odorless white to off-white crystalline powder with a slightly bitter taste.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Dexamethasone may be sensitive to prolonged exposure to light. Dexamethasone is incompatible with strong oxidizers, strong acids, acid chlorides and acid anhydrides. Oxidation may occur with bases.

Fire Hazard

Flash point data for Dexamethasone are not available; however, Dexamethasone is probably combustible.

Biological Activity

Glucocorticoid; anti-inflammatory. Reduces levels of activated NF- κ B in immature dendritic cells (DCs) and inhibits differentiation into mature DCs.

Biochem/physiol Actions

Target IC50: 5 nM Inhibiting the expression of inducible but not constitutive nitric oxide synthase in vascular endothelial cells

Pharmacology

Dexamethasone is a corticosteroid with high glucocorticoid activity and virtually no mineralocorticoid activity. I ts mechanism of action as an antiemetic is unknown, but it is possible that either direct genomic or indirect non-genomic effects on 5-HT3 and GABAA receptors contribute to its antiemetic activity. Many of the original studies were carried out using 8– 10mg of dexamethasone phosphate, but smaller doses (2.5–4mg) provide equal antiemetic efficacy with minimal risk of adverse effects. Concerns relating to adrenal suppression and other steroid-induced adverse effects (including increased risk of bleeding) after a single dose of dexamethasone remain largely unfounded. O ne of the most unpleasant adverse effects of dexamethasone involves intense perineal stimulation after rapid i.v. injection.

Pharmacokinetics

The activity of dexamethasone, as measured by glycogen deposition, is 20 times greater than that of hydrocortisone. It has five times the anti-inflammatory activity of prednisolone. Clinical data indicate that this compound has seven times the antirheumatic potency of prednisolone. It is roughly 30 times more potent than hydrocortisone. Its pharmacokinetics are presented in Table 33.3. Routes of metabolism for dexamethasone are similar to those for prednisolone, with its primary 6β-hydroxy metabolite being recovered in urine. Dexamethasone sodium phosphate is the water-soluble sodium salt of the 21-phosphate ester, with an IV half-life of less than 10 minutes because of rapid hydrolysis by plasma phosphatases. Peak plasma levels for dexamethasone usually are attained in approximately 10 to 20 minutes following its IV administered dose. A similar reaction occurs when the phosphate ester is applied topically or by inhalation.

Clinical Use

Corticosteroid:
Cerebral oedema
Bacterial meningitis (unlicensed indication)
Suppression of inflammatory and allergic disorders
Rheumatic disease
Congenital adrenal hyperplasia
Anti-emetic (unlicensed indication)

Safety Profile

Poison by intraperitoneal and subcutaneous routes. An experimental teratogen. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of F-.

Synthesis

Dexamethasone, 9|á-fluoro-16|á-methyl-11|?,17,21-trihydroxypregna- 1,4-dien-3,20-dione (27.1.51), or simply 9|á-fluoro-16|á-methylprednisolone. The distinctive characteristic of dexamethasone is the presence of a fluorine atom at C9 of the steroid ring.
Dexamethasone is synthesized in a multistage process from 3|á-acetoxy-16-pregnen- 11,20-dione, which is reacted with methylmagnesium bromide in the presence of lithium bromide to give 3|á-hydroxy-16|á-methylpregnan-11,20-dione (27.1.39), after which a 17|á- hydroxyl group is added. This is done by a reaction with acetic anhydride in the presence of p-toluenesulfonic acid, forming the 3-acetoxy-17-enolacetate 27.1.40, which is epoxidized by perbenzoic acid 27.1.41, and the product is hydrolyzed by an alkali to give an oxyketone 27.1.42. Addition of another hydroxyl group at C21 is accomplished by subsequent bromination of a methyl group with molecular bromine, replacing the bromine atom with iodine, and reacting iodide with potassium acetate, which forms the corresponding acetoxyketone 27.1.43. The hydroxyl group at C3 is oxidized to a carbonyl by chromium(VI) oxide in pyridine, giving the 3,11,20-triketone 27.1.44, which again undergoes bromination by molecular bromine, but at position C4. Dehydrogenation of this compound is accomplished using semicarbazide, which results in the formation of an unsaturated triketone 27.1.45. In order to avoid formation of semicarbazones at the keto-groups at C3 and C20, the final product is treated with pyruvic acid. Semicarbazones are then specially formed at the keto-groups of C3 and C20, and the keto-group at C11 that does not take part in semicarbazone formation is reduced to hydroxyl group using sodium borohydride. After removing the protective semicarbzone groups, 21-O-acetoxy-16|?-methylhydrocortisone (27.1.46) is formed. This is reacted with potassium acetate and transformed to the epoxide 27.1.49. Reacting this with hydrofluoric acid results in an opening of the epoxide ring, during which the fluorohydrin 27.1.50 is formed. Finally, microbiological dehydrogenation of this compound at C1¨CC2 and simultaneous deacetylation gives dexamethasone (27.1.51).

Veterinary Drugs and Treatments

Glucocorticoids have been used in an attempt to treat practically every malady that afflicts man or animal, but there are three broad uses and dosage ranges for use of these agents. 1) Replacement of glucocorticoid activity in patients with adrenal insufficiency, 2) as an antiinflammatory agent, and 3) as an immunosuppressive. Among some of the uses for glucocorticoids include treatment of: endocrine conditions (e.g., adrenal insufficiency), rheumatic diseases (e.g., rheumatoid arthritis), collagen diseases (e.g., systemic lupus), allergic states, respiratory diseases (e.g., asthma), dermatologic diseases (e.g., pemphigus, allergic dermatoses), hematologic disorders (e.g., thrombocytopenias, autoimmune hemolytic anemias), neoplasias, nervous system disorders (increased CSF pressure), GI diseases (e.g., ulcerative colitis exacerbations), and renal diseases (e.g., nephrotic syndrome). Some glucocorticoids are used topically in the eye and skin for various conditions or are injected intra-articularly or intralesionally. The above listing is certainly not complete. For specific dosages and indications refer to the Doses section.
High dose dexamethasone use for shock or CNS trauma is controversial; recent studies have not demonstrated significant benefit and it actually may cause increased deleterious effects.

Drug interactions

Potentially hazardous interactions with other drugs
Aldesleukin: avoid concomitant use.
Antibacterials: metabolism accelerated by rifamycins; metabolism possibly inhibited by erythromycin; concentration of isoniazid possibly reduced.
Anticoagulants: efficacy of coumarins and phenindione may be altered.
Antiepileptics: metabolism accelerated by carbamazepine, fosphenytoin, phenobarbital, phenytoin and primidone
Antifungals: increased risk of hypokalaemia with amphotericin - avoid; metabolism possibly inhibited by itraconazole and ketoconazole; caspofungin concentration possibly reduced (may need to increase dose).
Antivirals: concentration of indinavir, lopinavir, saquinavir and telaprevir possibly reduced; avoid with rilpivirine; concentration possibly increased by ritonavir.Ciclosporin: rare reports of convulsions in patients on ciclosporin and high-dose corticosteroids.
Cobicistat: concentration possibly increased by cobicistat.
Cytotoxics: possibly decreases axitinib concentration, increase dose of axitinib.
Diuretics: enhanced hypokalaemic effects of acetazolamide, loop diuretics and thiazide diuretics.
Netupitant: concentration of dexamethasone increased - halve dexamethasone dose.
Vaccines: high dose corticosteroids can impair immune response to vaccines; avoid concomitant use with live vaccines.

Metabolism

Corticosteroids are metabolised mainly in the liver but also in other tissues, and are excreted in the urine. The slower metabolism of the synthetic corticosteroids with their lower protein-binding affinity may account for their increased potency compared with the natural corticosteroids. Up to 65% of a dose of dexamethasone is excreted in urine within 24 hours.

storage

-20°C (protect from light)

Purification Methods

Dexamethasone has been recrystallised from Et2O or small volumes of EtOAc. Its solubility in H2O is 10 mg/100mL at 25o; and is freely soluble in Me2CO, EtOH and CHCl3. [Arth et al. J Am Chem Soc 80 3161 1958; for the -methyl isomer see Taub et al. J Am Chem Soc 82 4025 1960, see Beilstein 8 IV 3501.]

References

1) Merck Index 14 2943

Dexamethasone Preparation Products And Raw materials

Raw materials

Preparation Products

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Dexamethasone Suppliers

Xi'an Kono chem co., Ltd.
Tel
29-86107037-8016 15891718909
Fax
15891718909
Email
info@konochemical.com
Country
China
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Shanghai EFE Biological Technology Co., Ltd.
Tel
021-65675885 18964387627
Fax
021-65675885
Email
info@efebio.com
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China
ProdList
9709
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58
Hubei huizepu Pharmaceutical Technology Co., Ltd
Tel
027-027-59212684 19107121455
Fax
QQ:2188308251
Email
p19107121455@163.com
Country
China
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Henan Wasai Biological Technology Co. LTD
Tel
13526611694
Email
2582571190@qq.com
Country
China
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Shandong Yuhe Pharmaceutical Technology Co., LTD
Tel
15263077727
Fax
QQ:2938966534
Email
1436425847@qq.com
Country
China
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Wuhan Zenuo Biopharmaceutical Technology Co., Ltd
Tel
027-87781970 15172508891
Email
1505560767@qq.com
Country
China
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Wuhan Juchengyuan Biotechnology Co., Ltd
Tel
400-0276007 18062142210
Email
804180422@qq.com
Country
China
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Henan Kuanzhan Biological Technology Co. LTD
Tel
15660520685
Email
w986122@qq.com
Country
China
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J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
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jkinfo@jkchemical.com
Country
China
ProdList
96815
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3B Pharmachem (Wuhan) International Co.,Ltd.
Tel
821-50328103-801 18930552037
Fax
86-21-50328109
Email
3bsc@sina.com
Country
China
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View Lastest Price from Dexamethasone manufacturers

Hebei Dangtong Import and export Co LTD
Product
Dexamethasone 50-02-2
Price
US $948.00-940.00/kg
Min. Order
10kg
Purity
99.99%
Supply Ability
100Tons
Release date
2023-03-17
Sinoway Industrial co., ltd.
Product
Dexametasona 50-02-2
Price
US $125.00-45.00/Kg/Bag
Min. Order
1Kg/Bag
Purity
99% up, High Density
Supply Ability
20 tons
Release date
2023-12-01
WUHAN CIRCLE POWDER TECHNOLOGY CO.,LTD
Product
Dexamethasone 50-02-2
Price
US $0.00/KG
Min. Order
100g
Purity
98%+
Supply Ability
100kg
Release date
2020-09-11

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