2 4 6 trimethyl 1 3 5 trioxane July 8, 2019 16 32 64 128 2 4 6 trimethyl 1 3 5 triazine 1 3 5-triazine-2 4 6-triamine 2 4 6-tri(2-pyridyl)-1 3 5-triazine 2 4 6-tris(2-pyridyl)-s-triazine