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Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate

Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate Structure
Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate structure
CAS No.
103335-41-7
Chemical Name:
Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate
Synonyms
Finasteride EP Impurity B;Finasteride impurity B (EP);(4aR,4bS,6aS,7S,9aS,9bS,11aR);Dutasteride Related Impurity 4;Finasteride Methyl Ester Analog;Dutasteride Methyl Ester Impurity;Methyl 3-Oxo-4-aza-5alpha-androst-1;Finasteride Δ-1-AZA ESTER [Ph.Eur. Impurity B];Finasteride Impurity 2（Finasteride EP Impurity B）;Finasteride EP Impurity B(Dutasteride Impurity 11)
CBNumber:
CB01011348
Molecular Formula:
C20H29NO3
Molecular Weight:
331.45
MDL Number:
MFCD00876749
MOL File:
103335-41-7.mol
MSDS File:
SDS
Last updated:2026-09-12 18:28:28
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Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate Properties

Melting point 280-282°C (dec.)
Boiling point 478.6±45.0 °C(Predicted)
Density 1.113±0.06 g/cm3(Predicted)
storage temp. Sealed in dry,2-8°C
solubility Chloroform (Slightly), DMSO (Slightly, Heated), Methanol (Slightly, Heated)
form Solid
pka 14.15±0.70(Predicted)
color White to Off-White
InChIKey WMSQGMYJYBSBKA-ALHYADCGSA-N
SMILES N1[C@@]2([H])[C@@](C)([C@@]3([H])CC[C@@]4(C)[C@]([H])([C@]3([H])CC2)CC[C@@H]4C(OC)=O)C=CC1=O
FDA UNII DDK98J5FUO

SAFETY

Risk and Safety Statements

Symbol(GHS)  Health Hazard (GHS08)
GHS08
Signal word  Warning
Hazard statements  H412-H361
Precautionary statements  P273-P501-P201-P202-P281-P308+P313-P405-P501
REACH Registrations Active

Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate price More Price(20)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Usbiological 018899 3-Oxo-4-aza-5α-αndrost-1-ene-17β-carboxylic Acid Methyl Ester 103335-41-7 10mg $418 2026-06-03 Buy
Biosynth FO26685 3-Oxo-4-aza-5a-a-ndrost-1-ene-17b-carboxylic acid methyl ester 103335-41-7 1g $900 2026-06-04 Buy
Biosynth FO26685 3-Oxo-4-aza-5a-a-ndrost-1-ene-17b-carboxylic acid methyl ester 103335-41-7 0.5g $900 2026-06-04 Buy
Biosynth FO26685 3-Oxo-4-aza-5a-a-ndrost-1-ene-17b-carboxylic acid methyl ester 103335-41-7 0.25g $900 2026-06-04 Buy
Biosynth FO26685 3-Oxo-4-aza-5a-a-ndrost-1-ene-17b-carboxylic acid methyl ester 103335-41-7 0.1g $900 2026-06-04 Buy
Product number Packaging Price Buy
018899 10mg $418 Buy
FO26685 1g $900 Buy
FO26685 0.5g $900 Buy
FO26685 0.25g $900 Buy
FO26685 0.1g $900 Buy

Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate Chemical Properties, Uses, Production

Chemical Properties

Off-White Solid

Uses

Finasteride (F342000) and Dutasteride (D735000) impurity. An intermediate in the synthesis of Finasteride and Dutasteride, 5α-reductase inhibitors used for treatment of benign prostatic hyperplasia ac ne, seborrhea, female hirsutism, prostatitis, and prostatic carcinoma and other hyperandrogenetic related disorders.

Uses

3-Oxo-4-aza-5α-αndrost-1-ene-17β-carboxylic Acid Methyl Ester (Finasteride EP Impurity B) is an impurity of Finasteride (F342000) and Dutasteride (D735000). An intermediate in the synthesis of Finasteride and Dutasteride, 5α-reductase inhibitors used for treatment of benign prostatic hyperplasia acne, seborrhea, female hirsutism, prostatitis, and prostatic carcinoma and other hyperandrogenetic related disorders. Finasteride impurity.

Uses

Finasteride (F342000) impurity. A novel intermediate in the synthesis of Finasteride, a 5α-reductase inhibitor used for treatment of benign prostatic hyperplasia acne, seborrhea, female hirsutism, prostatitis, and prostatic carcinoma and other hyperandrogenetic related disorders.

Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate synthesis

67-56-1
104239-97-6
103335-41-7
Synthesis of Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate from Methanol and 4-Aza-5a-androstan-1-ene-3-one-17b-carboxylic acid

Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate Preparation Products And Raw materials

Raw materials

Benzeneseleninic anhydride Methanol

Preparation Products

Methyl 4-aza-5alpha-androsta-3-one-17beta-carboxylate 4-Aza-5a-androstan-1-ene-3-one-17b-carboxylic acid 3-Oxo-4-aza-5α-αndrost-1,5-diene-17β-carboxylic Acid Methyl Ester 3-Oxo-4-aza-11a-Methoxy-5α-αndrost-1-ene-17β-carboxylic Acid Methyl Ester 3-Oxo-4-azaandrosta-1,5,7-triene-17-carboxylic Acid Methyl Ester

Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate Suppliers

Global Suppliers ( 102)
Supplier Tel Email Country ProdList Advantage
Nanjing XiZe Biotechnology CO., Ltd. 025-66023220 15250997978 1511893459@qq.com China 4777 55
Yunnan Convek biochemistry Co., Ltd. 18687219753 18687219753 3836098249@qq.com China 62 58
Hubei Norna Technology Limited Company 59209883 17386169806 service@nornachem.com China 4829 58
Hubei Peien Biotechnology Co., Ltd. 13127581762 13127581762 peilingchem@sina.com China 499 58
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
Nanjing Chemlin Chemical Co., Ltd 025-83697070 13770331960 info@chemlin.com.cn China 16305 64
Chemsky（shanghai）International Co.,Ltd. 021-50135380 shchemsky@sina.com China 32273 50
Daicel Chiral Technologies (China)CO.,LTD 021-50460086-9 15921403865 han_yajun@dctc.daicel.com China 7909 65
S.Z. PhyStandard Bio-Tech. Co., Ltd. 0755-4000505016 13380397412 3001272453@qq.com China 5000 50
UHN Shanghai Research & Development Co., Ltd. 021-58958002 18930822973 sales@uhnshanghai.com China 997 58
Supplier Advantage
Nanjing XiZe Biotechnology CO., Ltd. 55
Yunnan Convek biochemistry Co., Ltd. 58
Hubei Norna Technology Limited Company 58
Hubei Peien Biotechnology Co., Ltd. 58
J & K SCIENTIFIC LTD. 76
Nanjing Chemlin Chemical Co., Ltd 64
Chemsky（shanghai）International Co.,Ltd. 50
Daicel Chiral Technologies (China)CO.,LTD 65
S.Z. PhyStandard Bio-Tech. Co., Ltd. 50
UHN Shanghai Research & Development Co., Ltd. 58

View Latest Price from Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
3-Oxo-4-aza-5-alpha-androstane-17-beta-carboxylic acid pictures 2026-06-30 3-Oxo-4-aza-5-alpha-androstane-17-beta-carboxylic acid
103335-41-7
 1KG 98.0% 10000KGS Shaanxi Dideu New Materials Co. Ltd
Dutasteride Ester Impurity pictures 2026-05-15 Dutasteride Ester Impurity
103335-41-7
 $1.50 1g 99.0% Min 100 Tons Shaanxi Didu New Materials Co. Ltd
METHYL 4-AZA-5ALPHA-ANDROSTA-1-EN-3-ONE-17BETA-CARBOXYLATE pictures 2020-01-17 METHYL 4-AZA-5ALPHA-ANDROSTA-1-EN-3-ONE-17BETA-CARBOXYLATE
103335-41-7
 $1.00 1KG 85.0-99.8% 200kgs Career Henan Chemical Co

103335-41-7 (Methyl 4-aza-5alpha-androsta-1-en-3-one-17beta-carboxylate) Related Search:

4-Aza-5a-androstan-1-ene-3-one-17b-carboxylic acid Ethyl 3-Oxo-4-aza-5α-androst-1-ene-17β-carboxylate Dutasteride Chloro IMpurity Dutasteride Related Impurity 1 Dutasteride EP Impurity I
(4aR,4bS,6aS,7S,9aS,9bS,11aS)-4a,6a-diMethyl-2-oxohexadecahydro-1H-indeno[5,4-f]quinoline-7-carboxylic acid 5,6-Dehydro-17β-dutasteride 5β-Dutasteride Dutasteride IMpurity L Dutasteride Impurity E (Dutasteride 17-alfa-epimer)
JWJOTENAMICLJG-XHGXNVPLSA-N 1,4-Bis(trifluoromethyl)-benzene 3,4-Bis-trifluoromethyl-phenylamine (5a,6a,17)-N-(1,1-Dimethylethyl)-6-hydroxy-3-oxo-4-azaandrost-1-ene-17-carboxamide 2,5-Bis(trifluoromethyl)aniline
Dutasteride Dihydrodutasteride 2,6-Bis(trifluoromethyl)aniline

1of4

METHYL 3-OXO-4-AZA-5-ALPHA-ANDROST-1-ENE-17-BETA-CARBOXYLATE 3-Oxo-4-aza-5α-αndrost-1-ene-17β-carboxylic Acid Methyl Ester (4aR,4bS,6aS,7S,9aS,9bS,11aR)-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-Tetradecahydro-4a,6a-diMethyl-2-oxo- Finasteride Methyl Ester Analog (4aR,4bS,6aS,7S,9aS,9bS,11aR)-Methyl 4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7, 8,9,9a,9b,10,11,11a-t (4aR,4bS,6aS,7S,9aS,9bS,11aR) -Methyl 4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylate methyl (1S,3aS,3bS,5aR,9aR,9bS,11aS)-9a,11a-dimethyl-7-oxo-1,2,3,3a,3b,4,5,5a,6,9b,10,11-dodecahydroindeno[5,4-f]quinoline-1-carboxylate Dutasteride Methyl Ester Impurity methyl 3-oxo-4-aza-5α-androst-1-ene-17β-carboxylate Finasteride Impurity B (Dutasteride Ester Impurity) Finasteride Impurity 2（Finasteride EP Impurity B） METHYL 4-AZA-5ALPHA-ANDROSTA-1-EN-3-ONE-17BETA-CARBOXAMIDE(M4) methyl-3- oxo-4-aza-5-alfa-androst-1ene-17-beta-carboxylate Dutasteride Ester Impurity (Finasteride EP Impurity B) Finasteride EP Impurity B (Dutasteride Ester Impurity) (4aR,4bS,6aS,7S,9aS,9bS,11aR)-Methyl 4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylate Finasteride impurity B (EP) (4aR,4bS,6aS,7S,9aS,9bS,11aR)-Methyl 4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a Finasteride EP Impurity B Methyl 3-Oxo-4-aza-5alpha-androst-1 1H-Indeno[5,4-f]quinoline-7-carboxylic acid, 2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-4a,6a-dimethyl-2-oxo-, methyl ester, (4aR,4bS,6aS,7S,9aS,9bS,11aR)- Finasteride EP Impurity B/ Finasteride Related Compund D (Dutasteride Methyl Ester Analog/Finasteride Methyl Ester Analog) Dutasteride Methyl Ester Analog (Finasteride Methyl Ester Analog) Dutasteride Related Impurity 4 Finasteride EP Impurity B(Dutasteride Impurity 11) Methyl-3-oxo-4-aza-5alpha-androst-1-ene-17beta-carboxylate（M4） (4aR,4bS,6aS,7S,9aS,9bS,11aR)-Methyl 4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylate (Dutasteride Impurity) 3-Oxo-4-azα-5α-androst-1-ene-17β-carboxylic Acid Methyl Ester 3-Oxo-4-aza-5α-αndrost-1-ene-173-carboxylic acid methyl ester Finasteride EP Impurity B / Finasteride Related Compound D / Dutasteride Methyl Ester Impurity / Dutasteride MethylEsterAnalog methyl (4aR,4bS,6aS,7S,9aS,9bS,11aR)-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1H-indeno[5,4-f]quinoline-7-carboxylate Methyl 3-Oxo-4-aza-5alpha-androst-1-ene-17beta-carboxylate (Delta-1-Aza Ester) Finasteride Δ-1-AZA ESTER [Ph.Eur. Impurity B] 103335-41-7 Intermediates Intermediates & Fine Chemicals Pharmaceuticals Steroids