Synonyms: 1,4-Diketo-3,6-diphenyl-pyrrolo-[3,4-c]-pyrrole;1,4-Diketo-3,6-diphenylpyrrolo[3,4-c]pyrrole;1,4-Dioxo-3,6-diphenylpyrrolo[3,4-c]pyrrole;2,5-Dihydro-3,6-diphenyl-1,4-diketopyrrolo[3,4-c]pyrrole;2,5-Dihydro-3,6-diphenylpyrrolo[3,4-c]pyrrole-1,4-dione;3,6-Diphenyl-1,4-diketopyrrolo[3,4-c]pyrrole;3,6-Diphenyl-1,4-pyrrolo[3,4-c]pyrroledione;3,6-Diphenyl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione;C.I. 561050;C.I. Pigment Red 255;Cromophtal Coral Red C;Irgazin DPP Red 5G;Irgazin DPP Scarlet EK;Irgazin Scarlet EK;PR 255;Pigment Red 255;