Acetic acid (2S,3S)-2-acetoxy-1-[(S)-1-((3S,5S,8S,9S,10R,13S,14S,17R)-3-chloro-10,13-dimethyl-6-oxo-hexadecahydro-cyclopenta[a]phenanthren-17-yl)-ethyl]-3-ethyl-4-methyl-pentyl ester                                                                                                                                                              在
                                                                                                                                                                                 
1,1,2,3-四甲基胍                                                                                                                                  作用下,
                                                                                                                                                                                        反应 0.08h,
                                                                                                                以90%的产率得到Acetic acid (2S,3S)-2-acetoxy-1-[(S)-1-((1aS,3aR,3bS,5aS,6R,8aS,8bS)-3a,5a-dimethyl-10-oxo-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-ethyl]-3-ethyl-4-methyl-pentyl ester