(3S,8R,9S,10R,17R)-17-Hydroxymethyl-10,17-dimethyl-2,3,4,7,8,9,10,11,12,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol 、
三氯乙酰异氰酸酯 生成 (2,2,2-Trichloro-acetyl)-carbamic acid (3S,8R,9S,10R,17R)-10,17-dimethyl-17-(2,2,2-trichloro-acetylcarbamoyloxymethyl)-2,3,4,7,8,9,10,11,12,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl ester