Acetic acid (3S,3aR,4S,4aR,6S,7aR,8R,9aR)-6-acetoxy-8-hydroxy-3,4a,8-trimethyl-2,5-dioxo-dodecahydro-azuleno[6,5-b]furan-4-yl ester                                                                                                                                                              在
                                                                                                                                                                                 sodium tetrahydroborate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 0.17h,
                                                                                                                以12 mg的产率得到Acetic acid (3S,3aR,4S,4aS,5R,6S,7aR,8R,9aR)-6-acetoxy-5,8-dihydroxy-3,4a,8-trimethyl-2-oxo-dodecahydro-azuleno[6,5-b]furan-4-yl ester