r,t-1,2-dimethoxy-c,c-3,4-epoxy-1,2,3,4-tetrahydronaphthalene

r,t,t-1,2,4-trimethoxy-c-3-hydroxy-1,2,3,4-tetrahydronaphthalene

r,c-1,4-dimethoxy-t,t-2,3-dihydroxy-1,2,3,4-tetrahydronaphthalene

r,t-1,4-dimethoxy-t,c-2,3-dihydroxy-1,2,3,4-tetrahydronaphthalene

1,4-dihydro-5,8-dimethoxy-1,4-epoxynaphthalene