Synonyms: 1,2,3,4-Tetramethyl-5,6-dinitrobenzene;1,2-Dinitro-3,4,5,6-tetramethylbenzene; 3,4,5,6-Tetramethyl-1,2-dinitrobenzene;5,6-Dinitro-1,2,3,4-tetramethylbenzene; Dinitroprehnitene; NSC 174103;Tetramethyl-1,2-dinitrobenzene; o-Dinitrotetramethylbenzene