2,2,2-三氟乙醇 、
2-[(3R,4S,5S,8S,9S,10S,13R,14S,16R)-3-Acetoxy-16-bromo-4,8,10,14-tetramethyl-11-oxo-hexadecahydro-cyclopenta[a]phenanthren-(17Z)-ylidene]-6-methyl-hept-5-enoic acid 2-oxo-2-phenyl-ethyl ester 生成 2-[(3R,4S,5S,8S,9S,10S,13R,14S,16S)-3-Hydroxy-4,8,10,14-tetramethyl-11-oxo-16-(2,2,2-trifluoro-ethoxy)-hexadecahydro-cyclopenta[a]phenanthren-(17Z)-ylidene]-6-methyl-hept-5-enoic acid