Acetic acid 2-((4aS,4bR,5S,6aS,6bS,9aR,10aS,10bR)-4b,12-difluoro-5-hydroxy-4a,6a,8,8-tetramethyl-2-oxo-2,4a,4b,5,6,6a,9a,10,10a,10b-decahydro-7,9-dioxa-pentaleno[2,1-a]phenanthren-6b-yl)-2-oxo-ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 sodium tetrahydroborate                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 Acetic acid 2-((4aS,4bR,5S,6aS,6bS,9aR,10aS,10bR)-4b,12-difluoro-2,5-dihydroxy-4a,6a,8,8-tetramethyl-2,3,4,4a,4b,5,6,6a,9a,10,10a,10b-dodecahydro-7,9-dioxa-pentaleno[2,1-a]phenanthren-6b-yl)-2-oxo-ethyl ester