title: Neoclerodane diterpenoids from Teucrium montbretii subsp. libanoticum and their absolute configuration.
abstract: From the aerial parts of Teucrium montbretii subsp. libanoticum 10 neoclerodane diterpenoids were isolated. Three of them are new [3beta-hydroxyteubutilin A (1), 12-epi-montanin G (2), 20-epi-3,20-di-O-deacetylteupyreinidin (3)], whereas the other seven, namely, 6-ketoteuscordin (4), teuscordinon (5), 6beta-hydroxyteuscordin (6), montanin D (7), 3,20-di-O-deacetylteupyreinidin (8), montanin G (9), and 3-O-deacetylteugracilin A (10), are previously known structures. The structures of 1-3 were determined by spectral and chemical methods.
authors.affiliation: Dipartimento Chimica Organica, Università Palermo, Viale delle Scienze, Parco d'Orleans II, 90128 Palermo, Italy. bruno@dicpm.unipa.it
authors.forename: Maurizio
authors.initials: M
authors.lastname: Bruno
authors.forename: Maria Luisa
authors.initials: ML
authors.lastname: Bondì
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: Nelly A
authors.initials: NA
authors.lastname: Arnold
mesh_terms: D002855:Chromatography, Thin Layer; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D019686:Lamiaceae / Q000737:chemistry* / Q000145:classification; D007861:Lebanon; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013237:Stereoisomerism
chemical_list: C451135:12-epi-montanin G; C451136:20-epi-3,20-di-O-deacetylteupyreinidin; C451134:3-hydroxyteubutilin A; D004224:Diterpenes; C061639:teuscordonin; C024716:Montanin