| Product Name | Finasteride - Impurity B | 
| Product Code | DA-F034-c | 
| Chemical name | 3-Oxo-4-aza-5α-αndrost-1-ene-17β-carboxylic Acid Methyl Ester | 
| Synonyms | (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-1H-indeno[5,4-f]quinoline-7-carboxylic Acid Methyl Ester; (5a,17ß)-3-Oxo-4-azaandrost-1-ene-17-carboxylic Acid Methyl Ester; Methyl 3-Oxo-4-aza-5a-androst-1-ene-17ß-carboxylate; Finasteride Impurity; Dutasteride Methyl Ester Analog; Dutasteride Ester impurity; Dutasteride methyl ester Impurity; | 
| Impurity | NA | 
| CAS Number | 103335-41-7 | 
| Alternate CAS # | NA | 
| Molecular form | C20H29NO3 | 
| Appearance | Off-White Solid | 
| Melting Point | NA | 
| Mol. Weight | 331.45 | 
| Storage | 2-8°C Refrigerator | 
| Solubility | NA | 
| Stability | NA | 
| Category | steroids,intermediates,pharmaceutical standards,Fine Chemicals | 
| Boiling Point | NA | 
| Applications | NA | 
| Dangerous Goods Info | NA | 
| References | NA | 
| Extra Notes | NA | 
| Documents (MSDS) | No Data Available | 
| Keywords | NA |