3a, 12c-Dihydro-9-nitro-8-hydroxy-6, 11-dimethoxy-7H-furo(3', 2':4, 5)furo(2, 3-C)xanthen-7-one

3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 11a, 11b-Dodecahydrophenanthro(9, 10-c)furan-1, 3-dione

3a, 4, 5, 6, 7, 7a-Hexahydro-2, 6(or 3, 6)-dimethyl-4, 7-methano-1H-inden-5-ol

3a, 4, 5, 6, 7, 7a-Hexahydro-4, 7-methano-1H-inden-6-yl butyrate

3a, 4, 5, 6, 7, 7a-Hexahydro-4, 7-methano-1H-indenyl isobutyrate

3a, 4, 5, 6, 7, 7a-Hexahydro-4, 7-methanoindenyl acrylate

3a, 4, 5, 6, 7, 7a-Hexahydrodimethyl-4, 7-methano-1H-indene

3a, 4, 5, 6, 7, 7a-Hexahydrodimethyl-4, 7-methano-1H-indenemethanol

3a, 4, 5, 6, 7, 7a-Hexahydromethoxy-4, 7-methano-1H-indene

3a, 4, 5, 6, 7, 7a-Hexahydromethoxydimethyl-4, 7-methano-1H-indene

3a, 4, 5, 6, 7, 8-Hexahydrocyclohepta(c)pyrazol-3(2H)-one

3a, 4, 5, 6-Tetrahydro-1, 1, 3-trimethylindancarbaldehyde

3a, 4, 5, 6-Tetrahydro-2, 2, 3a-trimethylindancarbaldehyde

3A, 4, 5, 6a-Hexahydro-2-oxo-4-(3-oxo-5-(3-pyridyl)-1-pentenyl)-2H-cyclopenta(b)furan-5-yl(1, 1'-biphenyl)-4-carboxylate

3a, 4, 7, 7a-Tetrahydro-1, 3(2H)-dioxo-4, 7-methano-1H-isoindol-2-yl (benzyloxy)formate

3a, 4, 7, 7a-Tetrahydro-3a, 5(or 3a, 6)-dimethylisobenzofuran-1, 3-dione

3a, 4, 7, 7a-Tetrahydroindene

3a, 4, 7, 7a-Tetrahydroisoindoline

3a, 4, 7, 7a-Tetrahydroisoindoline, cis-

3a, 4, 7, 7a-Tetrahydroisoindoline, trans-