Acta Cryst. (2004). E60, o403-o405  [ doi:10.1107/S1600536804003368 ]

rac-(1R,11R,14S,18R)-Methyl 18-hydroxy-19-oxotricyclo[9.7.1.0^1,14]nonadecane-11-carboxylate

S. Fresu, M. Schürmann, H. Preut and P. Eilbracht

Abstract: The investigated crystal of the title compound, C₂₁H₃₄O₄, contains two molecules in the asymmetric unit. One molecule shows disorder for two atoms in the 12-membered ring. The two independent molecules show only slight conformational differences. Four molecules are linked via two O-HO hydrogen bonds [OO = 2.816 (2) Å and O-HO = 163°; OO = 2.764 (2) Å and O-HO = 163°] and a centrosymmetric 16-membered heterocycle containing four hydrogen bonds is formed.

Online 20 February 2004

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