英文别名KETOBISNORALDEHYDE; 3-KETO-4-PREGNENE-20-BETA-CARBOXALDEHYDE; 4-PREGNEN-20BETA-CARBOXALDEHYDE-3-ONE; 4-PREGNEN-3-ONE-20-BETA-CARBOXALDEHYDE; Progesterone EP Impurity I; Progesterone Impurity 7; Progesterone EP Impurity I (S-isomer); (20S)-3-oxopregn-4-ene-20-carboxaldehyde 
