6,7-dimethyl-1,4-dioxaspiro[4.5]decan-8-one

2,3,6-trimethyl-4a,5,8,8a-tetrahydronaphthalene-1,4-dione

5,8-dihydroxy-2,3,6,7-tetramethylnaphthalene-1,4-dione

5,7-diethoxy-2,3-dimethylnaphthalene-1,4-diol

1,4-二甲氧基-2,3-甲基苯