Synonyms: 1,4-Diketo-3,6-bis(4-biphenylyl)pyrrolo[3,4-c]pyrrole;1,4-Diketo-3,6-di(biphenyl-4-yl)pyrrolo(3,4-c)pyrrole;3,6-Bis(4-biphenylyl)-1,4-diketopyrrolo[3,4-c]pyrrole;3,6-Bis(4-biphenylyl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione; C.I. 561300;C.I. Pigment Red 264; DPP Rubine TR; Irgazin DPP Rubine FTX; Irgazin DPP RubineTR; Irgazin Ruby Opaque; Pigment Red 264; Rubine TR