Neoclerodanes from Teucrium orientale |
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Authors: | Bruno Maurizio Rosselli Sergio Maggio Antonella Piozzi Franco Scaglioni Leonardo Arnold Nelly A Simmonds Monique S J |
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Affiliation: | Dipartimento di Chimica Organica E. Paternò, Università di Palermo, Viale delle Scienze, Parco d'Orleans II, Palermo, Italy. |
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Abstract: | Two new neoclerodane diterpenoids, 6-deacetyl-teucrolivin A (5) and 8beta-hydroxy-teucrolivin B (6), were isolated from the aerial parts of Teucrium orientale, along with four already known neoclerodane diterpenoids, teucrolivin A (1), teucrolivin B (2), teucrolivin C (3) and teucrolivin H (4), previously isolated from Teucrium oliverianum. Their structures were elucidated on the basis of spectroscopic evidence and chemical transformations. Compounds 1-3 were assayed for antifeedant activity against Spodoptera littoralis, S. frugiperda and Heliocoverpa armigera. Teucrolivin A was the most potent of the three compounds tested. |
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