Acta Cryst. (2007). E63, o2101-o2103  [ doi:10.1107/S1600536807014018 ]

Revision of the structure of podocarpaside E, from Actaea podocarpa

Z. Ali, I. A. Khan and F. R. Fronczek

Abstract: The title compound, (I), 3,15,25-trihydroxy-16,23-dioxo-6,19-epidioxy-9,10-seco-9,19-cyclolanost-5(10),9(11)-diene 3-O--L-arabinopyranoside, crystallizes as the monohydrate, C₃₅H₅₂O₁₁·H₂O. It has an endo-epoxide rather than two OH groups on its seven-membered ring. The O-O distance is 1.473 (3) Å, and the C-O-O-C torsion angle is -30.4 (3)°. OO distances in hydrogen bonds are in the range 2.679 (3)-3.015 (3) Å.

Online 4 April 2007

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