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Published on: December 23, 2022
Neoclerodanes from Teucrium orientale
Maurizio Bruno1, Sergio Rosselli, Antonella Maggio
1Dipartimento di Chimica Organica E. Paternò, Università di Palermo, Viale delle Scienze, Parco d'Orleans II, Palermo, Italy.
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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