(5R)-5-[(2R,7R)-7-ethyl-7-methyl-9-(1-methylethoxy)-8-[4-(methylsulfonyl)phenyl]-1,4,6-trioxaspiro[4.4]non-8-en-2-yl]-3,4-dihydroxy-2(5H)-furanone                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃   、                                                                                         
水                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                生成                                                 (5R)-5-[(2S,7R)-7-ethyl-7-methyl-9-(1-methylethoxy)-8-[4-(methylsulfonyl)phenyl]-1,4,6-trioxaspiro[4.4]non-8-en-2-yl]-3,4-dihydroxy-2(5H)-furanone monosodium salt