Acta Cryst. (2005). E61, o494-o496  [ doi:10.1107/S160053680500259X ]

The natural naphthoquinone sterekunthal-B

K. Ravikumar, B. Sridhar, S. V. Reddy, U. S. Kumar and J. M. Rao

Abstract: The title structure, 15,18-dimethyl-5-dioxo-14-oxapentacyclo[11.4.1.0^2,15.0^4,13.0^6,11]octadeca-3,6,8,10-tetraene-18-carbaldehyde, C₂₀H₁₈O₄, is a novel naphthoquinone, isolated from Stereospermum personatum. In the bicyclic system, all three six-membered rings adopt a boat conformation. Two intermolecular C=OH-C interactions link the molecules into a chain.

Online 29 January 2005

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