FINASTERIDE

DUTASTERIDE

INTERMEDIATES

PREGNENOLONE ACETATE

3beta-Acetoxy-5-pregnen-20-one

F4 ( Methyl 4-Androsten-3-one-17beta-Carboxylinate )

F5 ( 4-Androsten-3-one-17beta-Carboxylic acid )

F6 ( N-t-butyl-4-Androsten-3-one-17beta-Carboxamide )

F8 ( N-t-butyl-4-aza-Androsta-5-en-3-one-17beta-Carboxamide )

F9 ( N-t-butyl-4-aza-5-alpha-Androsta-3-one-17beta-Carboxamide )

M2 ( Methyl 4-aza-5-Androsten-3-one-17beta-Carboxylate )

M2-acid ( 4-aza-5-Androsten-3-one-17beta-Carboxylic acid )

M3 ( Methyl 4-aza-5alpha-Androsta-3-one-17beta-Carboxylate )

M3-ACID ( 4-aza-5alpha-Androsta-3-one-17beta-Carboxylic acid )

M4 ( Methyl 4-aza-5alpha-Androsta-1-en-3-one-17beta-Carboxylate )

M4-ACID

4-aza-5alpha-Androsta-1-en-3-one-17beta-Carboxylic acid