乙酸酐 、
24-methylenecholest-5-ene-1α,3β,11α,18-tetrol 18-acetate 在
吡啶 作用下,
以9 mg的产率得到Acetic acid (1S,3R,8S,9S,10R,11R,13S,14S,17R)-3,11-diacetoxy-13-acetoxymethyl-17-((R)-1,5-dimethyl-4-methylene-hexyl)-10-methyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-1-yl ester