5,5'-dimethoxy-4,4'-di-t-butyl-2,2'-diphenoquinone                                                                                                                                                                                              以
                                                                                         Petroleum ether                                                                                  为溶剂,
                                                                                                                                                                                        以0.40 g的产率得到3,4',6'-tritert-butyl-1'-[4-tert-butyl-2-[2-tert-butyl-5-(4-tert-butyl-2-hydroxy-5-methoxyphenyl)-1-methoxy-4-oxocyclohexa-2,5-dien-1-yl]oxy-5-methoxyphenyl]-4,4'a,7'-trimethoxyspiro[cyclohexa-2,4-diene-6,9'-xanthene]-1,2'-dione