Benzyl 1-Benzyl-2,7-dioxo-1,3-diazepane-4-carboxylate is a byproduct in the synthesis of Hexahydro-2,7-dioxo-1H-1,3-diazepine-4-carboxylic Acid (H293865), which is derived from Hexahydro-4-methyl-1H-azepine (H294135), which is a 4-substituted hexahydro azepine.