(5R,6S,8S,9R,14R,15R,17R,18S,21S,24R,26S,27R)-5α-Chloro-16,24-cyclo-13,14-secoergost-2-ene-18,26-dioic acid-14:17,14:27-diepoxy-6β,13,20,22-tetrahydroxy-1,15-dioxo-γ-lactone δ-lactone methanol solvate monohydrate

Acta Crystallographica Section E Structure Reports Online
2005.0

Abstract

The title compound, C28H27O10Cl-CH3OH-H2O, was isolated from Physalis minima. The rigid molecule consists of eight fused rings involving three lactones. The spiro-fused --lactone rings are in half-chair and envelope conformations. The spirofused --lactone rings are fused to a cyclohexene ring, which is in a half-chair conformation. The outermost cyclohexene ring and -lactone rings adopt half-chair and envelope conformations, respectively. Intra- and intermolecular O—H---O, C— H---Cl and C—H---O hydrogen bonds are observed.

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