title: Neoclerodanes from Teucrium orientale.
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.
authors.affiliation: Dipartimento di Chimica Organica E. Paternò, Università di Palermo, Viale delle Scienze, Parco d'Orleans II, Palermo, Italy.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Bruno
authors.forename: Sergio
authors.initials: S
authors.lastname: Rosselli
authors.forename: Antonella
authors.initials: A
authors.lastname: Maggio
authors.forename: Franco
authors.initials: F
authors.lastname: Piozzi
authors.forename: Leonardo
authors.initials: L
authors.lastname: Scaglioni
authors.forename: Nelly A
authors.initials: NA
authors.lastname: Arnold
authors.forename: Monique S J
authors.initials: MS
authors.lastname: Simmonds
mesh_terms: D000818:Animals; D002855:Chromatography, Thin Layer; D045785:Diterpenes, Clerodane / Q000737:chemistry*; D005247:Feeding Behavior / Q000187:drug effects; D019686:Lamiaceae / Q000737:chemistry*; D007814:Larva; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D018411:Spodoptera
chemical_list: D045785:Diterpenes, Clerodane