Benzoic acid (3S,5R,6R,8S,13R,14S,17R)-17-((R)-1,5-dimethyl-hexyl)-6-hydroxy-5,13-dimethyl-2,3,4,5,6,7,8,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 、
甲基磺酰氯 在
吡啶 作用下,
生成
3β-Benzoyloxy-6β-methanesulfonyloxy-5-methyl-19-nor-5β-cholest-9-ene