3-(4-Nitrobenzyloximino)hexahydroazepin-2-one

The title compound, C₁₃H₁₅N₃O₄, occurs as two stereoisomers. The Z and E isomers display both potent relaxant activity. Crystal structure analysis clearly demonstrates that the studied isomer, the less active form, adopts the Z conformation. The molecules are held together by N-H...O hydrogen bonds and intermolecular ring-to-ring interactions forming head-to-tail hydrogen-bonded dimers and layered [pi]-stacking arrangement.

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