乙酸酐 、
lanisterol A 在
吡啶 作用下,
反应 2.5h,
以60 mg的产率得到Acetic acid (3S,4R,7R,8S,9S,10R,13S,14S,17S)-3,7-diacetoxy-17-(1-hydroxy-1,5-dimethyl-4-methylene-hexyl)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-4-yl ester