methyl 1,2,3,4,5,8-hexahydro-5,8-dioxonaphthalene-2-carboxylate

methyl 1,2,3,4-tetrahydro-5,8-dihydroxynaphthalene-2-carboxylate

9-Carbomethoxy-6,11-dihydroxy-5-oxoxantho<3,2-g>tetralin

9-(Hydroxymethyl)-6,11-dihydroxy-5-oxoxantho<3,2-g>tetralin

2-Acetoxy-5,8-dihydroxy-1,2,3,4-tetrahydro-naphthalene-2-carboxylic acid methyl ester