Respiratory Drugs Hormones and the Endocrine System Antipyretic analgesics Antiallergic drugs Antiparasitic drugs Antibiotics Antineoplastic agents Anesthetic Agents Urinary System Drugs Other Chemical drugs Synthetic Anti-infective Drugs Nervous system drugs Fluid, Electrolyte, and Acid-Base Balance Vitamins and Minerals medicines Digestive system drugs Blood System Drugs Circulatory system drugs Diagnostic agents Specialty drugs Drug metabolism Feed Additive Anti-stress drugs Heat-clearing prescription Common vaccine and bacterin Disease-resistant serum Animal Diagnostic Biologicals Drugs Influencing Immune Function Veterinary raw materials Inhibitors
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API

Respiratory Drugs Hormones and the Endocrine System Antipyretic analgesics Antiallergic drugs Antiparasitic drugs Antibiotics Antineoplastic agents Anesthetic Agents Urinary System Drugs Other Chemical drugs Synthetic Anti-infective Drugs Nervous system drugs Fluid, Electrolyte, and Acid-Base Balance Vitamins and Minerals medicines Digestive system drugs Blood System Drugs Circulatory system drugs Diagnostic agents Specialty drugs Drug metabolism Feed Additive Anti-stress drugs Heat-clearing prescription Common vaccine and bacterin Disease-resistant serum Animal Diagnostic Biologicals Drugs Influencing Immune Function Veterinary raw materials Inhibitors
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Active Pharmaceutical Ingredients (API), popularly  speaking, are the raw materials of medicines, only pharmaceutical raw materials are processed into pharmaceutical preparations , can they become medicines available for clinical use, so drugs we usually eat  are  the finished drugs  through processing.

Active Pharmaceutical Ingredients based on its sources can be divided into two major categories ,including  chemical synthetic drugs and natural chemical drugs.

Chemical  synthetic drugs can be divided into organic synthetic drugs and inorganic  synthetic drugs. Inorganic synthetic drugs are inorganic compounds (  very few is element), such as aluminum hydroxide, magnesium trisilicate which are used for the treatment of gastric and duodenal ulcers ; organic synthetic drugs are mainly composed of  drugs made by  basic organic chemical raw materials, through a series of organic chemical reactions  (such as aspirin, chloramphenicol, caffeine, etc.).

Natural chemical drugs ,based on its sources,can be divided into two categories including biochemical drugs and plant chemical drugs. Antibiotics are generally made by the microbial fermentation,  which belongs to the biochemistry category. A variety of semi-synthetic antibiotics occurs in recent years,which are biosynthesis and chemical synthesis combining products.Among active Pharmaceutical Ingredients, the organic synthetic drugs varieties, yields and values have  the largest proportion,which are  the main pillars of the chemical and pharmaceutical industries. The quality of active Pharmaceutical Ingredients  decides whether the formulation is good or bad , so its quality standards are very strict  ,countries in the world have developed national pharmacopoeia standards and strict quality control methods for its widely used active Pharmaceutical ingredients.

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Structure:
Chemical Name:
Alibendol
CAS:
26750-81-2
MF:
C13H17NO4
Structure:
Chemical Name:
Luliconazole
CAS:
187164-19-8
MF:
C14H10Cl2N3S2
Structure:
Chemical Name:
Clevidipine butyrate
CAS:
167221-71-8
MF:
C21H23Cl2NO6
Structure:
Chemical Name:
Sofalcone
CAS:
64506-49-6
MF:
C27H30O6
Structure:
Chemical Name:
Sitagliptin
CAS:
486460-32-6
MF:
C16H15F6N5O
Structure:
Chemical Name:
5-[2-[4-(1,2-Benzisothiazol-3yl)-1-piperazinyl]ethyl]-6-chloro-1,3-dihydro-2H-indol-2-one hydrochloride
CAS:
138982-67-9
MF:
C21H24Cl2N4O2S
Structure:
Chemical Name:
Etoricoxib
CAS:
202409-33-4
MF:
C18H15ClN2O2S
Structure:
Chemical Name:
N-(3-(5-(4-Chlorophenyl)-1H-pyrrolo[2,3-B]pyridine-3-carbonyl)-2,4-difluorophenyl)propane-1-sulfonaMide
CAS:
918504-65-1
MF:
C23H18ClF2N3O3S
Structure:
Chemical Name:
Canagliflozin
CAS:
842133-18-0
MF:
C24H25FO5S
Structure:
Chemical Name:
Olopatadine
CAS:
113806-05-6
MF:
C21H23NO3
Structure:
Chemical Name:
Nequinate
CAS:
13997-19-8
MF:
C22H23NO4
Structure:
Chemical Name:
Sitagliptin phosphate monohydrate
CAS:
654671-77-9
MF:
C16H20F6N5O6P
Structure:
Chemical Name:
Dronedarone
CAS:
141626-36-0
MF:
C31H44N2O5S
Structure:
Chemical Name:
10-Hydroxycamptothecin
CAS:
64439-81-2
MF:
C20H16N2O5
Structure:
Chemical Name:
Afatinib (BIBW 2992)
CAS:
439081-18-2
MF:
C24H25ClFN5O3
Structure:
Chemical Name:
Crizotinib
CAS:
877399-52-5
MF:
C21H22Cl2FN5O
Structure:
Chemical Name:
Raloxifene
CAS:
84449-90-1
MF:
C28H27NO4S
Structure:
Chemical Name:
Zileuton
CAS:
111406-87-2
MF:
C11H12N2O2S
Structure:
Chemical Name:
6-Aminopenicillanic acid
CAS:
551-16-6
MF:
C8H12N2O3S
Structure:
Chemical Name:
Eszopiclone
CAS:
138729-47-2
MF:
C17H17ClN6O3
Structure:
Chemical Name:
Darifenacin
CAS:
133099-04-4
MF:
C28H30N2O2
Structure:
Chemical Name:
PARECOXIB SODIUM
CAS:
198470-85-8
MF:
C19H17N2NaO4S
Structure:
Chemical Name:
Oseltamivir phosphate
CAS:
204255-11-8
MF:
C16H31N2O8P
Structure:
Chemical Name:
Alvimopan
CAS:
156053-89-3
MF:
C25H32N2O4
Structure:
Chemical Name:
Mitiglinide calcium
CAS:
207844-01-7
MF:
C38H52CaN2O8
Structure:
Chemical Name:
ISOPRINOSINE
CAS:
36703-88-5
MF:
C52H78N10O17
Structure:
Chemical Name:
Olaquindox
CAS:
23696-28-8
MF:
C12H13N3O4
Structure:
Chemical Name:
REBAMIPIDE
CAS:
111911-87-6
MF:
C19H15ClN2O4
Structure:
Chemical Name:
Citalopram hydrobromide
CAS:
59729-32-7
MF:
C20H22BrFN2O
Structure:
Chemical Name:
Miglitol
CAS:
72432-03-2
MF:
C8H17NO5
Structure:
Chemical Name:
FASUDIL
CAS:
103745-39-7
MF:
C14H17N3O2S
Structure:
Chemical Name:
Ulipristal Acetate
CAS:
126784-99-4
MF:
C28H35NO3
Structure:
Chemical Name:
2-(4-((2-(4-(Trifluoromethyl)phenyl)-5-methylthiazol-4-yl)methylthio)-2-methylphenoxy)acetic acid
CAS:
317318-70-0
MF:
C21H18F3NO3S2
Structure:
Chemical Name:
Pranlukast
CAS:
103177-37-3
MF:
C27H23N5O4
Structure:
Chemical Name:
Clopidogrel
CAS:
113665-84-2
MF:
C15H14ClNO2S
Structure:
Chemical Name:
Topotecan hydrochloride
CAS:
119413-54-6
MF:
C23H24ClN3O5
Structure:
Chemical Name:
Tafluprost
CAS:
209860-87-7
MF:
C25H34F2O5
Structure:
Chemical Name:
Lopinavir
CAS:
192725-17-0
MF:
C37H48N4O5
Structure:
Chemical Name:
Propiverine hydrochloride
CAS:
54556-98-8
MF:
C23H30ClNO3
Structure:
Chemical Name:
LACOSAMIDE
CAS:
175481-36-4
MF:
C13H18N2O3
Structure:
Chemical Name:
Carbazochrome sodium sulfonate
CAS:
51460-26-5
MF:
C10H17N4NaO8S
Structure:
Chemical Name:
Fingolimod hydrochloride
CAS:
162359-56-0
MF:
C19H34ClNO2
Structure:
Chemical Name:
Tiotropium bromide
CAS:
136310-93-5
MF:
C19H22BrNO4S2
Structure:
Chemical Name:
Cabazitaxel
CAS:
183133-96-2
MF:
C45H57NO14
Structure:
Chemical Name:
Dapoxetine hydrochloride
CAS:
119356-77-3
MF:
C21H23NO
Structure:
Chemical Name:
Pemetrexed disodium
CAS:
150399-23-8
MF:
C20H19N5Na2O6
Structure:
Chemical Name:
10-Hydroxycamptothecin
CAS:
19685-09-7
MF:
C20H16N2O5
Structure:
Chemical Name:
6-Chloronicotinic acid
CAS:
5326-23-8
MF:
C6H4ClNO2
Structure:
Chemical Name:
ILOPERIDONE
CAS:
133454-47-4
MF:
C24H27FN2O4
Structure:
Chemical Name:
4-Aminophenylarsonic acid
CAS:
98-50-0
MF:
C6H8AsNO3
Structure:
Chemical Name:
Modafinil
CAS:
68693-11-8
MF:
C15H15NO2S
Structure:
Chemical Name:
Empagliflozin
CAS:
864070-44-0
MF:
C23H27ClO7
Structure:
Chemical Name:
Promestriene
CAS:
39219-28-8
MF:
C22H32O2
Structure:
Chemical Name:
Pirfenidone
CAS:
53179-13-8
MF:
C12H11NO
Structure:
Chemical Name:
7-Ethyl-10-hydroxycamptothecin
CAS:
86639-52-3
MF:
C22H20N2O5
Structure:
Chemical Name:
Exemestane
CAS:
107868-30-4
MF:
C20H24O2
Structure:
Chemical Name:
2-Methylimidazole
CAS:
693-98-1
MF:
C4H6N2
Structure:
Chemical Name:
Saxagliptin
CAS:
361442-04-8
MF:
C18H25N3O2
Structure:
Chemical Name:
Esomeprazole
CAS:
119141-88-7
MF:
C17H19N3O3S
Structure:
Chemical Name:
Decoquinate
CAS:
18507-89-6
MF:
C24H35NO5
Structure:
Chemical Name:
Maraviroc
CAS:
376348-65-1
MF:
C29H41F2N5O
Structure:
Chemical Name:
Vildagliptin
CAS:
274901-16-5
MF:
C16H15F6N5O?H3O4P?H2O
Structure:
Chemical Name:
Imatinib mesylate
CAS:
220127-57-1
MF:
C30H35N7O4S
Structure:
Chemical Name:
Vitamin B6
CAS:
8059-24-3
MF:
C10H16N2O3S
Structure:
Chemical Name:
Lornoxicam
CAS:
70374-39-9
MF:
C13H10ClN3O4S2
Structure:
Chemical Name:
Bismuththiol
CAS:
1072-71-5
MF:
C2H2N2S3
Structure:
Chemical Name:
2-[(Acetyloxy)methoxy]ethyl acetate
CAS:
59278-00-1
MF:
C7H12O5
Structure:
Chemical Name:
Tirofiban hydrochloride monohydrate
CAS:
150915-40-5
MF:
C22H39ClN2O6S
Structure:
Chemical Name:
Argatroban
CAS:
74863-84-6
MF:
C23H36N6O5S
Structure:
Chemical Name:
Deferasirox
CAS:
201530-41-8
MF:
C21H15N3O4
Structure:
Chemical Name:
Gefitinib
CAS:
184475-35-2
MF:
C22H24ClFN4O3
Structure:
Chemical Name:
Montelukast sodium
CAS:
151767-02-1
MF:
C35H35ClNNaO3S
Structure:
Chemical Name:
Selumetinib
CAS:
606143-52-6
MF:
C17H15BrClFN4O3
Structure:
Chemical Name:
(R)-1H-3-BENZAZEPINE,8-CHLORO-2,3,4,5-TETRAHYDRO-1-METHYL-,HYDROCHLORIDE
CAS:
846589-98-8
MF:
C11H15Cl2N
Structure:
Chemical Name:
Seratrodast
CAS:
112665-43-7
MF:
C22H26O4
Structure:
Chemical Name:
Dolasetron mesylate
CAS:
115956-13-3
MF:
C20H26N2O7S
Structure:
Chemical Name:
2-Aminothiazol-4-acetic acid
CAS:
29676-71-9
MF:
C5H6N2O2S
Structure:
Chemical Name:
Geldanamycin
CAS:
30562-34-6
MF:
C29H40N2O9
Structure:
Chemical Name:
Duloxetine
CAS:
116539-59-4
MF:
C18H19NOS
Structure:
Chemical Name:
Bortezomib
CAS:
179324-69-7
MF:
C19H25BN4O4
Structure:
Chemical Name:
1,3-Dibromo-5,5-dimethylhydantoin
CAS:
77-48-5
MF:
C5H6Br2N2O2
Structure:
Chemical Name:
1,3-Diacetoxy-2-(acetoxymethoxy)propane
CAS:
86357-13-3
MF:
C10H16O7
Structure:
Chemical Name:
Suplatast tosilate
CAS:
94055-76-2
MF:
C23H33NO7S2
Structure:
Chemical Name:
Iguratimod
CAS:
123663-49-0
MF:
C17H14N2O6S
Structure:
Chemical Name:
Flibanserin
CAS:
167933-07-5
MF:
C20H21F3N4O
Structure:
Chemical Name:
Pranoprofen
CAS:
52549-17-4
MF:
C15H13NO3
Structure:
Chemical Name:
Dabigatran Etexilate Mesylate
CAS:
872728-81-9
MF:
C34H41N7O5.CH4O3S
Structure:
Chemical Name:
Rubitecan
CAS:
91421-42-0
MF:
C20H15N3O6
Structure:
Chemical Name:
Quinine
CAS:
130-95-0
MF:
C20H24N2O2
Structure:
Chemical Name:
Argatroban
CAS:
141396-28-3
MF:
C23H38N6O6S
Structure:
Chemical Name:
Nevirapine
CAS:
129618-40-2
MF:
C15H14N4O
Structure:
Chemical Name:
Terbinafine Hydrochloride
CAS:
78628-80-5
MF:
C21H26ClN
Structure:
Chemical Name:
3-Bromo-2,3,4,5-tetrahydro-2H-benzo[b]azepin-2-one
CAS:
86499-96-9
MF:
C10H10BrNO
Structure:
Chemical Name:
Zofenopril calcium
CAS:
81938-43-4
MF:
C44H44CaN2O8S4
Structure:
Chemical Name:
Mildronate
CAS:
76144-81-5
MF:
C6H14N2O2
Structure:
Chemical Name:
2-Phenoxyethanol
CAS:
122-99-6
MF:
C8H10O2
Structure:
Chemical Name:
Ethylenediaminetetraacetic acid
CAS:
60-00-4
MF:
C10H16N2O8
Structure:
Chemical Name:
Trichloroacetic acid
CAS:
76-03-9
MF:
C2HCl3O2
Structure:
Chemical Name:
Entecavir hydrate
CAS:
209216-23-9
MF:
C12H17N5O4
Structure:
Chemical Name:
Posaconazole
CAS:
171228-49-2
MF:
C37H42F2N8O4