1-methyl-3a,8b-dihydroindeno[2,3-d]triazol-4-one;1-methyl-3a,8b-dihydroindeno[2,3-d][1,2,3]triazol-4-one;55507-30-7;Indeno(1,2-d)triazol-8(3H)-one, 3a,8a-dihydro-3-methyl-;Indeno[1,2-d]triazol-8(3H)-one,3a,8a-dihydro-3-methyl-
1-methyl-3a,8b-dihydroindeno[2,3-d]triazol-4-one