Ethyl 2-hydroxy-5,11-dioxopyrrolo[2,1-c][1,4]benzodiazepine-10-acetate

Abstract

The title compound, C16H18N2O5, consists of a benzodiazepinedione system fused to a pyrrole system. The seven-membered ring adopts a boat-shaped conformation (with the methine C atom as the prow); the five-membered ring adopts an enveloped-shaped conformation (with the hydroxy-bearing C atom as the flap). The hydroxy group is hydrogen bonded to the carbonyl O atom of an adjacent molecule generating a zigzag chain in the crystal structure.