3-acetoxy-3-acetyl-1,1-ethylenedioxy-1,2,3,4-tetrahydro-5,8-dimethoxynaphthalene

3'-acetoxy-3'-acetyl-1',2',3',4'-tetrahydro-5',8'-dimethoxyspiro<1,3-dithiolan-2,1'-naphthalene>

methyl 3'-acetoxy-1',2',3',4'-tetrahydro-5',8'-dimethoxyspiro<1,3-dithiolan-2,1'-naphthalene>-3'-carboxylate

3,6,11-triacetoxy-3-acetyl-1,1-ethylenendioxy-1,2,3,4,5,5a,6,11,11a,12-decahydronaphthacene-5,12-quinone

3',6',11'-triacetoxy-3'-acetyl-1',2',3',4',5',5a',6',11,11a',12'-decahydro-5',12'-dioxospiro<1,3-dithiolan-2,1'-naphthacene>