[(2R,3R,4aR,6aS,6aS,6bS,8aS,9R,12aS,14aS,14bR)-3-acetyloxy-9-hydroxy-4,4,6a,6b,10,10,12a,14b-octamethyl-1,2,3,4a,5,6,6a,7,8,8a,9,11,12,13,14,14a-hexadecahydropicen-2-yl] acetate 在
五氯化磷 作用下,
生成
Trichloro-acetic acid 1-((3S,3aR,5aS,5bS,7aS,11aS,11bS,13aS,13bR)-5a,5b,8,8,11a,13b-hexamethyl-icosahydro-cyclopenta[a]chrysen-3-yl)-1-methyl-ethyl ester