6,8-dimethyl-1,3-diphenylpteridin-2,4,7-trione 6,8'-endoperoxide
6,8-dimethyl-1,3-diphenyl-5'-methoxypteridin-2,4,7-trione 6,8'-endoperoxide
2a,4-Dimethyl-3,6,8-trioxo-2,5,7-triphenyl-2,2a,3,4,5,6,7,8-octahydro-1H-4,5,7,8b-tetraaza-cyclobuta[a]naphthalene-1-carbonitrile