Acetic acid (3S,5R,10S,13R,14R,17R)-7,11-dibromo-17-((1S,2R,3S,4R)-2,3-dibromo-1,4,5-trimethyl-hexyl)-10,13-dimethyl-2,3,4,5,6,7,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester 在
aluminum oxide 作用下,
以
苯 为溶剂,
生成
22,23-Dibrom-12-methyl-18-norergosta-8,11,13-trien-3β-yl-acetat