(3S,5R,8R,9S,10S,13S,14S,16S)-17-Ethoxyethynyl-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthrene-3,14,16,17-tetraol 在
硫酸 作用下,
以
丙酮 为溶剂,
生成 [(3S,5R,8R,9S,10S,13R,14S,16S)-3,14,16-Trihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-(17Z)-ylidene]-acetic acid ethyl ester