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M. Chaitanya, P. Anbarasan, 1,2,4,5-Tetrazines in Section 9: Six-membered Rings with Three or more Heteroatoms, and their Fused Carbocyclic Derivatives, S. J. Gharpure, S. Ed. In Comprehensive Heterocyclic Chemistry IV, D. Balck, C. Stevens and J. Cossy, Eds.; Elsevier Science, 2021, (in press).