Acta Cryst. (2013). E69, o2
[ doi:10.1107/S1600536812048945 ]
Abstract: In the stable polymorph of the title compound, C17H19NO3 [systematic name: (5,6)-7,8-didehydro-4,5-epoxy-17-methylmorphinan-3,6-diol], the molecular conformation is in agreement with the characteristics of previously reported morphine forms. The molecule displays the typical T-shape and its piperidine ring adopts a slightly distorted chair conformation. Intermolecular O-HO hydrogen bonds link the molecules into helical chains parallel to the b axis. Intramolecular O-HO hydrogen bonds are also observed.
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