3 6-diphenyl-1 2 4 5-tetrazine July 8, 2019 16 32 64 128 3 6 diphenyl 1 2 4 5 tetrazine 3 6-di(pyridin-4-yl)-1 2 4 5-tetrazine 3 6-di-2-pyridyl-1 2 4 5-tetrazine 3 6-di(pyridin-2-yl)-1 2 4 5-tetrazine 6-phenyl-1 3 5-triazine-2 4-diamine
