Acta Cryst. (2004). E60, o117-o119  [ doi:10.1107/S1600536803028745 ]

A neo-clerodane diterpene from Teucrium tomentosum

S. S. Devi, R. Malathi, S. S. Rajan, S. Aravind, G. N. Krishnakumari and K. Ravikumar

Abstract: A neo-clerodane diterpene, 15-hydroxy-15,16-epoxy-6-neo-cleroda-3,13(16),14-triene-18,19:20,12-diolide, C₂₀H₂₂O₆, showing antifeedant activity against lepidopterous pests, has been isolated from Teucrium tomentosum and characterized by NMR and X-ray crystallographic methods. The crystallographic studies reveal that the cyclohexene and cyclohexane rings adopt a half-chair and a chair conformation, respectively. The furan ring exhibits rotational disorder. The molecules in the crystal structure are stabilized by a network of O-HO and C-HO hydrogen bonds.

Online 19 December 2003

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