title: Labdane diterpenes from Marrubium velutinum and Marrubium cylleneum.
abstract: From the aerial parts of Marrubium velutinum and Marrubium cylleneum, seven labdane diterpenes, velutine A, 15-epi-velutine A, velutine B, 15-epi-velutine B, velutine C, cyllenine A and 15-epi-cyllenine A, have been isolated together with five known diterpenes and four known flavones. The structures of the isolated compounds were established by means of NMR [(1)H-(1)H-COSY, (1)H-(13)C-HMQC, HMBC, HMQC-TOCSY, NOESY] and MS spectral analyses. Complete NMR assignments are reported for known compounds.
authors.affiliation: Department of Pharmacognosy and Chemistry of Natural Products, School of Pharmacy, Panepistimiopolis-Zografou, GR-15771 Athens, Greece.
authors.forename: Anastasia
authors.initials: A
authors.lastname: Karioti
authors.forename: Jörg
authors.initials: J
authors.lastname: Heilmann
authors.forename: Helen
authors.initials: H
authors.lastname: Skaltsa
mesh_terms: D004224:Diterpenes / Q000737:chemistry*; D027522:Marrubium / Q000737:chemistry*; D015394:Molecular Structure
chemical_list: D004224:Diterpenes