%0 Journal Article %T 1-Methyl-3-(3-oxocyclohex-1-enyl)azepan-2-one %A Wei-jia Liu %A Hua-Jie Yuan %A Lei Chen %A Li Hai %J Acta Crystallographica Section E %D 2008 %I International Union of Crystallography %R 10.1107/s160053680802895x %X The title compound, C13H19NO2, is a intermediate in the synthesis of the opioid analgesic meptazinol. In the crystal structure, a weak intermolecular C¡ªH...O interaction occurs. %U http://scripts.iucr.org/cgi-bin/paper?S160053680802895X