Acetic acid (1R,2R,3S,4R)-5,6,7-trimethoxy-4-(5-methoxy-3,4-dioxo-cyclohexa-1,5-dienyl)-2,3-dimethyl-1,2,3,4-tetrahydro-naphthalen-1-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydrogensulfite                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以16%的产率得到(1α,2α,3β,4α)-4-(3,4-dihydroxy-5-methoxyphenyl)-5,6,7-trimethoxy-2,3-dimethyl-1,2,3,4-tetrahydronaphthalen-1-yl acetate