1 3 5-triazine-2 4 6-tricarboxylic acid July 8, 2019 16 32 64 128 2 4 6-tricyano-1 3 5-triazine 1 3 5-triazine-2 4 6-triamine 1 3 5-triazine-2 4 6(1h 3h 5h)-trione 2 4 5 trioxin