异丁基锰(II)碘化物   、                                                                                      
Formic acid (3R,5R,10S,13R,17R)-17-((R)-3-chlorocarbonyl-1-methyl-propyl)-10,13-dimethyl-12-oxo-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester                                                                                                                                                                                              以
                                                                                         
乙醚   、                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以52%的产率得到Formic acid (3R,5R,10S,13R,17R)-17-((R)-1,6-dimethyl-4-oxo-heptyl)-10,13-dimethyl-12-oxo-hexadecahydro-cyclopenta[a]phenanthren-3-yl ester