ent-12-acetoxymethyl-3α,10β-dihydroxy-17-(2'-nitrophenylselenyl)-20-norgibberellane-7,19-dioic acid 7-methyl ester 19,10-lactone                                                                                                                                                              在
                                                                                                                                                                                 
水   、                                                                                                  
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以97%的产率得到ent-17-(2'-nitrophenylselenyl)-3α,10β-dihydroxy-12-hydroxymethyl-20-norgibberellane-7,19-dioic acid 7-methyl ester 19,10-lactone