1 2 4 5-tetrazines July 8, 2019 16 32 64 128 1 2 4 5-tetrazine 1 2 4 5-tetrazine-3 6-dicarboxylic acid 1 2 4 5-tetrazine-3 6-diamine 1 2 4 5 tetrazine 3 6 dicarboxylate 1 2 4 5 tetrazine synthesis 1 2 3 5-tetrazine 2 4 5 trioxin 2 4 5 5 тетраметилоктан