Synonyms: 55507-29-4;AC1L3MUC;Indeno[1,2-d]triazol-8(3H)-one,3a,8a-dihydro-3-(4-nitrophenyl;1-(4-nitrophenyl)-3a,8b-dihydroindeno[1,2-d]triazol-4-one;Indeno(1,2-d)triazol-8(3H)-one, 3a,8a-dihydro-3-(4-nitrophenyl-;3-(4-nitrophenyl)-3a,8a-dihydroindeno[1,2-d][1,2,3]triazol-8(3H)-one