14α,15α-epoxy-17α-hydroxy-4-estren-3-one 、
三氯乙酰异氰酸酯 以
氘代氯仿 为溶剂,
生成 (2,2,2-Trichloro-acetyl)-carbamic acid (8R,9R,10R,13R,14R,15S,17R)-13-methyl-3-oxo-1,2,3,6,7,8,9,10,11,12,13,15,16,17-tetradecahydro-20-oxa-cyclopropa[14,15]cyclopenta[a]phenanthren-17-yl ester