title: Unsaturated diterpenoids with a novel carbocyclic skeleton from Salvia xalapensis.
abstract: Two diterpenoids with an unprecedented carbocyclic skeleton, salvixalapadiene (3) and isosalvixalapadiene (4), have been obtained from the leaves of Salvia xalapensis. The rearranged skeleton of these products may be derived biogenetically from a salvigenane precursor. In addition, two new rearranged diterpenoids (1 and 2) belonging to already known skeletons were isolated. The structures of the new compounds (1-4) were elucidated on the basis of spectroscopic data interpretation.
authors.affiliation: Instituto de Química de la Universidad Nacional Autónoma de México, Circuito Exterior de Ciudad Universitaria, Coyoacan 04510, México D.F., México. baldo@servidor.unam.mx
authors.forename: Baldomero
authors.initials: B
authors.lastname: Esquivel
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Tello
authors.forename: Ana Adela
authors.initials: AA
authors.lastname: Sánchez
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification*; D008800:Mexico; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D027544:Salvia / Q000737:chemistry*
chemical_list: D004224:Diterpenes