Fig. 2. Compounds used in this study.
Ortho-substituted bis-(4-pyridinyl)-1,2,4,5-tetrazines 1b–d, ortho-substituted bis-(2-pyridinyl)-1,2,4,5-tetrazines 2b–d, control tetrazines 2e-f, parent compounds 1a and 2a, and TCO derivatives 9 and 10.
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