1,2,4-triazino[5,6-b]quinoxaline, 3-(2,4,6-trimethylphenyl)- 3-mesityl[1,2,4]triazino[5,6-b]quinoxaline InChI=1/C18H17N5/c1-10-8-11(2)15(12(3)9-10)16-21-17-18(23-22-16)20-14-7-5-4-6-13(14)19-17/h4-9,16,18H,1-3H