ChemicalBook > CAS DataBase List > N-Boc-trans-4-Hydroxy-L-proline methyl ester

N-Boc-trans-4-Hydroxy-L-proline methyl ester

Product Name: N-Boc-trans-4-Hydroxy-L-proline methyl ester
CAS No.: 74844-91-0
Chemical Name: N-Boc-trans-4-Hydroxy-L-proline methyl ester
Synonyms: 1-tert-Butyl 2-methyl 4-hydroxypyrrolidine-1,2-dicarboxylate;BOC-HYP-OME;Boc-L-Hyp-OMe;N-BOC-4-HYDROXY-L-PROLINE METHYL ESTER;1-tert-butyl 2-methyl (2S,4R)-4-hydroxypyrrolidine-1,2-dicarboxylate;GOSO-001;BoC-Hyp-0me;BOC-L-Hyp Methyl ester;BOC-HYDROXYPROLINE-OME;N-Boc-trans-4-hydroxy-L
CBNumber: CB2207339
Molecular Formula: C11H19NO5
Formula Weight: 245.27
MOL File: 74844-91-0.mol

Less

N-Boc-trans-4-Hydroxy-L-proline methyl ester Property

Melting point:: 92-96 °C (lit.)
alpha: -65 º (c=1 CHCl3)
Boiling point:: 132°C/0.05mmHg(lit.)
Density: 1.216±0.06 g/cm3(Predicted)
storage temp.: Keep in dark place,Sealed in dry,Room Temperature
solubility: Soluble in chloroform, dichloromethane and ethyl acetate.
form: Crystalline Powder
pka: 14.27±0.40(Predicted)
color: White to light beige
optical activity: [α]20/D -65°, c = 1% in chloroform
InChI: InChI=1S/C11H19NO5/c1-11(2,3)17-10(15)12-6-7(13)5-8(12)9(14)16-4/h7-8,13H,5-6H2,1-4H3/t7-,8+/m1/s1
InChIKey: MZMNEDXVUJLQAF-SFYZADRCSA-N
SMILES: N1(C(OC(C)(C)C)=O)C[C@H](O)C[C@H]1C(OC)=O
LogP: 0.813 at 25℃
CAS DataBase Reference: 74844-91-0(CAS DataBase Reference)

Less

Safety

Hazard Codes: Xn
Risk Statements: 20/21/22-36/37/38
Safety Statements: 24/25-36-26
WGK Germany: 3
HazardClass: IRRITANT
HS Code: 29339900

Less

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

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

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

Less

N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 639737
Product name: N-Boc-trans-4-hydroxy-L-proline methyl ester
Purity: 97%
Packaging: 5g
Price: $21.36
Updated: 2025/07/31

TCI Chemical

Product number: B3843
Product name: N-(tert-Butoxycarbonyl)-trans-4-hydroxy-L-proline Methyl Ester
Purity: >95.0%(GC)
Packaging: 1g
Price: $30
Updated: 2025/07/31

TCI Chemical

Product number: B3843
Product name: N-(tert-Butoxycarbonyl)-trans-4-hydroxy-L-proline Methyl Ester
Purity: >95.0%(GC)
Packaging: 5g
Price: $87
Updated: 2025/07/31

TRC

Product number: H656560
Product name: (2S,4R)-4-Hydroxypyrrolidine-1,2-dicarboxylicAcid1-tert-ButylEster2-MethylEster
Packaging: 250g
Price: $485
Updated: 2021/12/16

Apolloscientific

Product number: OR43520
Product name: 1-tert-Butyl2-methyl(2S,4R)-4-hydroxypyrrolidine-1,2-dicarboxylate
Packaging: 500g
Price: $508
Updated: 2021/12/16

Less

N-Boc-trans-4-Hydroxy-L-proline methyl ester Chemical Properties,Usage,Production

Chemical Properties

Clear Colourless Oil

Uses

A potential iNOS inhibitor.

Uses

It is used in the synthesis of For-Met-Leu-Phe-OMe (fMLF-OMe) analogues based on Met residue replacement by 4-amino-proline scaffold.

Uses

(2S,4R)-4-Hydroxypyrrolidine-1,2-dicarboxylic Acid 1-tert-Butyl Ester 2-Methyl Ester roline scaffold.

reaction suitability

reaction type: Boc solid-phase peptide synthesis

Synthesis

24424-99-5

40216-83-9

74844-91-0

The general procedure for the synthesis of N-Boc-trans-4-hydroxy-L-proline methyl ester from di-tert-butyl dicarbonate and trans-4-hydroxy-L-proline methyl ester hydrochloride was as follows: the trans-4-hydroxy-L-proline methyl ester hydrochloride (14.5 g, 0.1 mol) obtained in step I was suspended in CH2Cl2 (400 mL), cooled to 0 °C, and with stirring, sequentially Et3N (28 mL, 0.2 mol), DMAP (0.61 g, 5 mmol) and Boc anhydride (27.5 mL, 0.12 mol) were added. The reaction mixture was gradually warmed to room temperature and stirring was continued for 2 hours. After completion of the reaction, the solvent was removed by concentration under reduced pressure, ether was added to the residual solid, the solid was collected by filtration and washed well with ether. The filtrates were combined and concentrated under reduced pressure. The residue was dissolved in CH2Cl2, washed with saturated aqueous NaHCO3 and saturated aqueous NaCl in turn, and the organic phase was dried with anhydrous Na2SO4. The solvent was evaporated under reduced pressure to give a light yellow oil, which was solidified by high vacuum treatment. The resulting solid was ground several times with hexane and dried in high vacuum to obtain 1-tert-butyl-2-methyl (2S,4R)-4-hydroxypyrrolidine-1,2-dicarboxylate as a white solid (24.5 g, 100% yield). The product characterization data were as follows:(M+1) 245; 1H NMR (CDCl3, 300MHz) δ 4.54-4.37 (m, 2H), 3.75 (s, 3H), 3.70-3.40 (m, 2H), 2.48-2.21 (m, 2H), 2.13-2.0 (m, 1H), 1.46 (s, 3H), 1.41 (s, 6H).

IC 50

Non-cleavable Linker

References

[1] Bioorganic and Medicinal Chemistry Letters, 2004, vol. 14, # 22, p. 5699 - 5702
[2] Patent: WO2007/113634, 2007, A1. Location in patent: Page/Page column 60-61
[3] Tetrahedron Asymmetry, 2009, vol. 20, # 12, p. 1433 - 1436
[4] Journal of Chemical Research, 2009, # 11, p. 668 - 670
[5] Tetrahedron Letters, 2012, vol. 53, # 30, p. 3847 - 3849

N-Boc-trans-4-Hydroxy-L-proline methyl ester Preparation Products And Raw materials

Raw materials

Preparation Products

Less

N-Boc-trans-4-Hydroxy-L-proline methyl ester Suppliers

Americas 1 Belgium 5 Canada 4 China 377 Europe 4 Germany 6 India 15 Japan 4 Switzerland 3 United Kingdom 10 United States 49 Global 478

Sci General Material & Chemical Ltd

Tel: 021-58388037;21-58388037 13472507714
Email: 35177634@qq.com;1589045147@qq.com
Country: China
ProdList: 803
Advantage: 55

Nanjing Ally Chemical S&T Co., Ltd.

Tel: 025-025-58367986 18913956109
Fax: QQ:3209878052
Email: amy.xiang@ally-chem.com
Country: China
ProdList: 568
Advantage: 58

Shanxi Bethlehem Pharm-Tech Co.,Ltd.

Tel: 19135651983 19135651206
Email: 243332738@qq.com
Country: China
ProdList: 908
Advantage: 58

Shanghai Chiral Chemicals Inc.

Tel: 021-37285021 13472570865
Fax: 86-021-51714507
Email: tym7xi@aliyun.com
Country: China
ProdList: 308
Advantage: 64

Zepeptide Biotechnology (Shijiazhuang) Co., LTD

Tel: 13383293380 18032131480
Email: 649498984@qq.com
Country: China
ProdList: 77
Advantage: 58

Jiangsu Jitai Peptide Technology Co., Ltd.

Tel: 0515-8085-5066 13770132022
Email: sales05@gtaipeptide.com
Country: China
ProdList: 2675
Advantage: 58

J & K SCIENTIFIC LTD.

Tel: 18210857532; 18210857532
Fax: 86-10-82849933
Email: jkinfo@jkchemical.com
Country: China
ProdList: 96815
Advantage: 76

Meryer (Shanghai) Chemical Technology Co., Ltd.

Tel: 4006356688 18621169109
Fax: 86-21-61259102
Email: market03@meryer.com
Country: China
ProdList: 40228
Advantage: 62

ITIC MEDCHEM(SUZHOU) CO.,LTD.

Tel: 0512-68323967 18015559028
Fax: +86-512-69200360
Email: sales@iticmedchem.com
Country: China
ProdList: 506
Advantage: 61

ChemFuture PharmaTech (Jiangsu) Ltd

Tel: 5108538618
Fax: 86 510 85386988-8017
Email: suger.wang@chemfuture.com
Country: China
ProdList: 832
Advantage: 65

Alfa Aesar

Tel: 400-6106006
Fax: 021-67582001/03/05
Email: saleschina@alfa-asia.com
Country: China
ProdList: 30123
Advantage: 84

TAIYUAN RHF CO.,LTD.

Tel: +86 351 7031519
Fax: +86 351 7031519
Email: sales@RHFChem.com
Country: China
ProdList: 2338
Advantage: 56

TCI (Shanghai) Development Co., Ltd.

Tel: 021-67121386
Fax: 021-67121385
Email: Sales-CN@TCIchemicals.com
Country: China
ProdList: 24529
Advantage: 81

Energy Chemical

Tel: 021-021-58432009 400-005-6266
Fax: 021-58436166
Email: sales8178@energy-chemical.com
Country: China
ProdList: 44801
Advantage: 61

Wuhan Chemwish Technology Co., Ltd

Tel: 86-027-67849912
Fax: 86-027-87531808
Email: sales@chemwish.com
Country: China
ProdList: 35896
Advantage: 56

GL Biochem (Shanghai) Ltd

Tel: 21-61263452 13641803416
Fax: 86-21-61263399
Email: ymbetter@glbiochem.com
Country: China
ProdList: 9981
Advantage: 64

Capot Chemical Co., Ltd

Tel: +86 (0) 571 85 58 67 18
Fax: 0086-571-85864795
Country: China
ProdList: 18207
Advantage: 66

Beijing Ouhe Technology Co., Ltd

Tel: 010-010-82967028 13522913783
Fax: +86-10-82967029
Email: 2355560935@qq.com
Country: China
ProdList: 12000
Advantage: 60

JinYan Chemicals(ShangHai) Co.,Ltd.

Tel: 13817811078
Fax: 86-021-50426522,50426273
Email: sales@jingyan-chemical.com
Country: China
ProdList: 9976
Advantage: 60

Shanghai Sinch Parmaceuticals Tech. Co. Ltd.

Tel: +86-21-54098501
Fax: +86-21-54096319
Email: sales@sinch.com.cn
Country: China
ProdList: 11598
Advantage: 64

Jia Xing Isenchem Co.,Ltd

Tel: 0573-85285100 18627885956
Fax: 0573-85285100
Email: isenchem@163.com
Country: China
ProdList: 9309
Advantage: 66

Accela ChemBio Co.,Ltd.

Tel: 021-50795510 4000665055
Fax: 021-50795055
Email: sales@accelachem.com
Country: China
ProdList: 11035
Advantage: 64

Shanghai Boc Chemical Co.,Ltd

Tel: 021-34975603-808 18721111801
Fax: +86-21-34975602-805
Email: sales@bocpharma.com
Country: China
ProdList: 1009
Advantage: 64

Shanghai Hanhong Scientific Co.,Ltd.

Tel: 021-54306202 13764082696
Email: info@hanhongsci.com
Country: China
ProdList: 42934
Advantage: 64

Chemsky（shanghai）International Co.,Ltd.

Tel: 021-50135380
Email: shchemsky@sina.com
Country: China
ProdList: 32321
Advantage: 50

Jinan Trio PharmaTech Co., Ltd.

Tel: 0531-88811783
Fax: +86 (531) 55696010 QQ 1762738062
Email: sales@trio-pharmatech.com
Country: China
ProdList: 1856
Advantage: 62

Beijing HengPuGao Pharmaceutical Chemistry Technology Co., Ltd.

Tel: 010-81520996 13439320863
Fax: 010-81520996
Email: hengpugao@126.com
Country: China
ProdList: 159
Advantage: 57

Daicel Chiral Technologies (China)CO.,LTD

Tel: 021-50460086-9 15921403865
Fax: +86-21-50462321
Email: han_yajun@dctc.daicel.com
Country: China
ProdList: 7471
Advantage: 65

Shanghai Ennopharm Co., Ltd.

Tel: +86 (21) 6435-5022
Country: China
ProdList: 4267
Advantage: 65

Sichuan Kulinan Technology Co., Ltd

Tel: 400-1166-196 18981987031
Fax: 028-84555506 800101999
Email: cdhxsj@163.com
Country: China
ProdList: 11705
Advantage: 57

China Langchem Inc.

Tel: 0086-21-58956006
Fax: 0086-21-58956100
Country: China
ProdList: 7811
Advantage: 57

Tianjin heowns Biochemical Technology Co., Ltd.

Tel: 400 638 7771
Email: sales@heowns.com
Country: China
ProdList: 14435
Advantage: 57

Sinopharm Chemical Reagent Co,Ltd.

Tel: 86-21-63210123
Fax: 86-21-63290778 86-21-63218885
Email: sj_scrc@sinopharm.com
Country: China
ProdList: 9815
Advantage: 79

SpringPharma Tech Co.,Ltd

Tel: +86-25-68710855, +86-25-68710897
Fax: 025-68710856
Email: sales@springpharma.net
Country: China
ProdList: 1261
Advantage: 62

Aemon Chemical

Tel: 0086-755-86198205
Email: acinfo@aemonchem.com
Country: China
ProdList: 1931
Advantage: 57

Hangzhou Yuhao Chemical Technology Co., Ltd

Tel: 0571-82693216
Fax: +86-571-82880190
Email: info@yuhaochemical.com
Country: China
ProdList: 6387
Advantage: 52

Chengdu Pukang Biotechnology Co., Ltd

Tel: +86-028-82550498 +86-19102685862
Fax: 086-28-82550468
Email: sales@pu-kang.com
Country: China
ProdList: 497
Advantage: 58

ShangHai YuanYe Biotechnology Co., Ltd.

Tel: 021-61312847 13636370518
Fax: 021-55068248
Email: shyysw007@163.com
Country: China
ProdList: 4999
Advantage: 60

Chengdu Ai Keda Chemical Technology Co., Ltd.

Tel: 4008-755-333 18080918076
Fax: 028-86757656
Email: 800078821@qq.com
Country: China
ProdList: 9718
Advantage: 55

T&W GROUP

Tel: 021-61551611 13296011611
Fax: ＋86 21-50676805
Email: contact@trustwe.com
Country: China
ProdList: 9895
Advantage: 58

Shanghai civi chemical technology co.,Ltd

Tel: 86-21-34053660
Fax: 86-21-34053661
Email: sale@labgogo.com
Country: China
ProdList: 9865
Advantage: 52

Thermo Fisher Scientific

Tel: 800-810-5118
Fax: +86-10-84193589
Email: cnchemical@thermofisher.com
Country: China
ProdList: 17770
Advantage: 75

Shanghai Topbiochem Technology Co., Ltd

Tel: 021-58170097
Email: info@topbiochem.com
Country: China
ProdList: 9510
Advantage: 58

Shanghai Topbiochem Technology Co., Ltd

Tel: +86-21-60341587
Fax: +86-21-61294319
Email: sales@topbiochem.com
Country: China
ProdList: 6175
Advantage: 58

Jiangsu Aikon Biopharmaceutical R&D co.,Ltd.

Tel: 025-66113011 17798518460
Fax: (1)02557626880
Email: cfzhang@aikonchem.com
Country: China
ProdList: 19913
Advantage: 55

Shanghai Jian Chao Chemical Technology Co., Ltd.

Tel: 150-2103-5486 18017383231
Fax: qq：2817624287
Email: 983544897@qq.com
Country: China
ProdList: 9342
Advantage: 55

SHANGHAI YINGRUI CHEMICAL TECHNOLOGY CO.,LTD.

Tel: 21-33585366 13311639313
Fax: +86-21-34979012
Email: sales@shyrchem.com
Country: China
ProdList: 806
Advantage: 55

9ding chemical ( Shanghai) Limited

Tel: 4009209199
Fax: 86-021-52271987
Email: sales@9dingchem.com
Country: China
ProdList: 18209
Advantage: 56

ShenZhen InnoSyn Biotech Co.,Ltd

Tel: 0755-28351685 18503098468
Fax: +86-755-28466854
Email: innosyn@163.com
Country: China
ProdList: 602
Advantage: 55

Shanghai Aladdin Bio-Chem Technology Co.,LTD

Tel: 400-6206333 13167063860
Fax: 021-50323701
Email: anhua.mao@aladdin-e.com
Country: China
ProdList: 25003
Advantage: 65

Less

View Lastest Price from N-Boc-trans-4-Hydroxy-L-proline methyl ester manufacturers

Hebei Chuanghai Biotechnology Co., Ltd

Product: N-Boc-trans-4-Hydroxy-L-proline methyl ester 74844-91-0
Price: US $30.00-10.00/KG
Min. Order: 50KG
Purity: 99%
Supply Ability: 500000kg
Release date: 2024-10-24

Hebei Yanxi Chemical Co., Ltd.

Product: N-Boc-trans-4-Hydroxy-L-proline methyl ester 74844-91-0
Price: US $20.00-1.00/kg
Min. Order: 1kg
Purity: 0.99
Supply Ability: 20 tons
Release date: 2023-11-29

Nanjing Fred Technology Co., Ltd

Product: N-Boc-trans-4-Hydroxy-L-proline methyl ester 74844-91-0
Price: US $0.00-0.00/kg
Min. Order: 1kg
Purity: 98%
Supply Ability: 1 ton
Release date: 2024-01-02

74844-91-0, N-Boc-trans-4-Hydroxy-L-proline methyl esterRelated Search:

Tribenuron methyl Basic Violet 1 L-PROLINE-(4-3H(N)) CHLOROPHOSPHONAZO III Methylparaben BOC-L-Proline D-Proline L-Hydroxyproline Methyl salicylate cis-4-Hydroxy-L-proline Methanol Kresoxim-methyl Methyl acrylate N-Boc-trans-4-tosyloxy-L-proline methyl ester N-Boc-trans-4-amino-L-proline methyl ester hydrochloride N-Boc-trans-4-amino-L-proline methyl ester Methyl 1-tert-butoxycarbonyl-4-hydroxy-L-proline ethyl ester

N-T-BOC-TRANS-4-HYDROXY-L-PROLINE METHYL ESTER

N-(TERT-BUTOXYCARBONYL)-TRANS-HYDROXYL-L-PROLINE METHYL ESTER

N-ALPHA-T-BUTOXYCARBONYL-L-HYDROXYPROLINE METHYL ESTER

N-BOC-TRANS-4-HYDROXYL-L-PROLINE METHYL ESTER

N-BOC-TRANS-4-HYDROXY-L-PROLINE METHYL ESTER

N-BOC-4-HYDROXY-L-PROLINE METHYL ESTER

N-BOC-L-TRANS-4-HYDROXY-PROLINE METHYL ESTER

(2R,4R)-4-HYDROXY-PYRROLIDINE-1,2-DICARBOXYLIC ACID 1-TERT-BUTYL ESTER 2-METHYL ESTER

(2S,4R)-1-(TERT-BUTOXYCARBONYL)-2-CARBOMETHOXY-4-HYDROXYPYRROLIDINE

(2S,4R)-BOC 4-HYDROXYPROLINE METHYL ESTER

(2S,4R)-1-BOC-4-hydroxy pyrrolidine-2-carboxylic acid methyl ester

1-tert-Butyl 2-methyl 4-hydroxypyrrolidine-1,2-dicarboxylate

1-tert-butyl 2-methyl (2S,4R)-4-hydroxypyrrolidine-1,2-dicarboxylate

(2S,4R)-1-tert-butyl 2-Methyl 4-hydroxypyrrolidine-1,2-dicarboxy

(2S,4R)-1-(tert-Butoxycarbonyl)-4-hydroxy-2-(methoxycarbonyl)pyrrolidine, trans-1-(tert-Butoxycarbonyl)-4-hydroxy-L-proline methyl ester

1-(tert-butyl) 2-Methyl (2S,4R)-4-hydroxytetrahydro-1H-pyrrole-1,2-dicarboxylate

(2S,4R)-1-tert-butyl 2-Methyl 4-hydro×ypyrrolidine-1,2-dicarbo×ylate

1-(tert-butyl) 2-Methyl (2S,4R)-4-hydro×ytetrahydro-1H-pyrrole-1,2-dicarbo×ylate

N-Boc-trans-4-hydroxy-L-proline Methyl Ester trans-Boc-Hyp-OMe 1-tert-Butyl 2-Methyl (2S,4R)-4-Hydroxypyrrolidine-1,2-dicarboxylate (2S,4R)-4-Hydroxypyrrolidine-1,2-dicarboxylic Acid 1-tert-Butyl 2-Methyl Ester

1,2-Pyrrolidinedicarboxylic acid, 4-hydroxy-, 1-(1,1-diMethylethyl) 2-Methyl ester, (2S,4R)-

N-Boc-trans-4-hydroxy-L-proline methyl ester 97%

N-BOC-L-Hydroxyproline methyl ester

BOC-L-Hyp Methyl ester

Boc-L-Hyp-OMe

trans-N-Boc-4-hydroxy-L-proline Methyl Ester

N-(tert-Butoxycarbonyl)-trans-4-hydroxy-L-proline methyl ester

1-tert-butyl 2-methyl (2S,4R)-4-hydroxy-1,2-pyrrolidinedicarboxylate

O1-tert-Butyl O2-methyl (2S,4R)-4-hydroxypyrrolidine-1,2-dicarboxylate

(2S,4R)-N-Boc-trans-4-hydroxy-L-proline methyl ester

BOC-L-4-HYDROXYPROLINE METHYL ESTER

BOC-HYP-OME

BOC-HYDROXYPROLINE-OME

BOC-L-T-4-HYDROXYPROLINE METHYL ESTER

BOC-L-HYDROXYPROLINE METHYL ESTER

BOC-L-4-TRANS-HYDROXYPROLINE METHYL ESTER

BOC-TRANS-4-HYDROXY-L-PROLINE METHYL ESTER

N-BOC-TRANS-4-HYDROXY-L-PROLINE METHYL &

N-Boc-trans-hydro-L-prolinemethylester

N-tert-Butoxycarbonyl-trans-4-hydroxy-L-proline methyl ester

N-(tert-Butoxycarbonyl)-trans-hydroxy-L-proline methyl ester

(2S,4R)-4-Hydroxypyrrolidine-1,2-dicarboxylic Acid 1-tert-Butyl Ester 2-Methyl Ester

Methyl (4R)-N-Boc-4-hydroxy-L-prolinate

N-tert-Butoxycarbonyl-L-hydroxyproline Methyl Ester

BOC-HYP-OME / BOC-L-HYDROXYPROLINE METHYL ESTER

N-BOC-trans-4-Hydroxy-L-proline methyl ester,97%

N-BOC-transydro-L-prolinemethylester

Boc-L-4-trans-hydroxyproline methyl ester≥ 99% (HPLC, Chiral purity)

trans-N-Boc-4-hydroxy-L-proline Methyl Ester,99%e.e.

1-O-tert-butyl 2-O-methyl (2S,4R)-4-hydroxypyrrolidine-1,2-dicarboxylate

(Tert-Butoxy)Carbonyl Hyp-OMe

GOSO-001

(2S,4R)-N-Boc-4-hydroxyproline methyl ester

N-(tert-Butoxycarbonyl)-trans-4-hydroxy-L-proline Methyl Ester &gt

N-Boc-trans-4-hydroxy-L

(2S,4R)-4-Hydroxypyrrolidine-1,2-dicarboxylic Acid 1-tert-Butyl 2-Methyl Ester

N-BOC-TRANS-4-HYDROXY-L-PROLINE METHYL ESTER,74844-91-0

N-Boc-trans-4-Hydroxy-L-proline methyl ester USP/EP/BP

Tert butoxycarbonyl-l-hydroxyproline methyl ester