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Acta Crystallographica Section C: Crystal Structure Communications, vol.62, no.5, 2006 (SCI-Expanded)
The ent-kaurene diterpene in the title compound, 7-epicandicandiol ethanol solvate, C20H32O2·C2H 6O, was isolated from the aerial parts of Sideritis ozturkii Aytaç & Aksoy. The molecule has the usual conformation and stereochemistry found in related ent-kaurene derivatives. The methyl-substituted ring junction has a trans arrangement and the other junction is cis. The six-membered rings have chair or slightly distorted chair conformations and the five-membered ring has an envelope conformation. Intermolecular hydrogen bonds link the 7-epicandicandiol and ethanol molecules into two-dimensional networks, part of which comprise co-operative O - H⋯O - H⋯O - H⋯ chains. © 2006 International Union of Crystallography.