3,3,6,6-tetramethyl-9-(4-nitrophenyl)-2,3,4,5,6,7,8,9-octahydro-1H-xanthene-1,8-dione
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9-(4-nitrophenyl)-3,3,6,6-tetramethyl-1,2,3,4,5,6,7,9-octahydro-1H-xanthene-1,8(2H)-dione
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9-(4’-nitrophenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8-(2H)-dione
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9-(4'-nitrophenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8-(2H)-dione
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3,3,6,6-tetramethyl-9-(4-nitrophenyl)-3,4,5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione
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3,3,6,6-Tetramethyl-9-(4-nitro-phenyl)-3,4,5,6,7,9-hexahydro-2H-xanthene-1,8-dione
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3,4,6,7-tetrahydro-3,3,6,6-tetramethyl-9-(4-nitrophenyl)-2H-xanthene-1,8(5H,9H)-dione
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