Isonicotinic acid (3R,5R,8R,9S,10S,12S,13R,14S,17R)-3-(3-dimethoxymethyl-benzoyloxy)-17-((R)-3-hydrazinocarbonyl-1-methyl-propyl)-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-12-yl ester 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
以83%的产率得到3α-(3-dimethoxyformylbenzoyloxy)-12α-(pyridine-4-carboxy)-5β-deoxycholan-24-oic hydrazone dimer