Synonyms: 1-(4-bromophenyl)-2-methyl-1H-naphth(2,3-d)imidazole-4,9-dione;1-(4-Bromophenyl)-2-methyl-1H-naphtho(2,3-d)imidazole-4,9-dione;1-(4-Bromophenyl)-2-methyl-1H-naphtho[2,3-d]imidazole-4,9-dione;1H-Naphth[2,3-d]imidazole-4,9-dione, 1-(4-bromophenyl)-2-methyl-;1H-Naphth[2,3-d]imidazole-4,9-dione, 1-(p-bromophenyl)- 2-methyl-