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Chemical structure of 4-methyl-5-oxo-2,3,4,6,8-pentazabicyclo[4.3.0]nona-2,7,9-triene-9-carboxamide covalently attached to the ε-amino group of lysine which in turn is bound to the carboxamide group of N-(2-aminopropyl)-4-(6-(pyrimidine-2-yl)-1,2,4,5-tetrazine-3-yl)benzamide (1) 28.
