- Dimethyl 2,6-di-tert-butyl-4,8-dioxo-1,2,5,6-tetrahydro-2,3a,4a,6,7a,8a-hexaazacy clopenta[def] fluorene-8b,8c-dicarboxylate
- Dimethylammonium 5,5-dimethyl-3-oxo-2-(3,3,6,6-tetramethyl-1,8-dioxo-2,3,4,5,6,7,8,9-octa hydro-1H-xanthen-9-yl)cyclohex-1-enolate 9-(2-hydroxy-4,4-dimethyl-6-oxocyclohex-1-enyl)-3,3,6,6-tetramethyl-3,4, 5,6,7,9-hexahydro-1H-xanthene-1,8(2H)-dione n-hexane hemisolvate monohydrate