6-hydroxy-2-(4,4-dimethyl-2,6-dioxocyclohexylidene)-1,2-dihydropyrimidin-4(3H)-one
2-diaminomethylidene-5,5-dimethyl-cyclohexane-1,3-dione
6-hydroxy-2-(4,4-dimethyl-2,6-dioxocyclohexylidene)-5-[4-oxo-2-(4,4-dimethyl-2,6-dioxocyclohexylidene)-1,2,3,4-tetrahydropyrimidin-6-yl]-1,2-dihydropyrimidin-4(3H)-one
4-amino-5,6,7,8-tetrahydro-7,7-dimethyl-2-phenylquinazoline-5-one