Acetic acid (1S,2S,4aS,7S,10aR)-1-acetoxymethyl-7-(3-diazo-2-oxo-propyl)-1,4a,7-trimethyl-1,2,3,4,4a,5,6,7,8,9,10,10a-dodecahydro-phenanthren-2-yl ester                                                                                                                                                              在
                                                                                                                                         dirhodium tetraacetate                                                                                                                                                                          作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以40%的产率得到Acetic acid (3S,4S,5R,10S,13R,14S)-4-acetoxymethyl-4,10,13-trimethyl-16-oxo-2,3,4,5,6,7,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-yl ester