title: Labdane diterpenes from Leonurus japonicus leaves.
abstract: Three labdane diterpenes 15,16-epoxy-6-hydroxylabda-5,8,13(16),14-tretraen-7-one (leojaponin), (9alpha,13S);15,16-diepoxy-7beta-hydroxylabd-14-en-6-one (13-epi-preleoheterin), and (9alpha,13R);15,16-diepoxy-6beta-hydroxylabd-14-en-7-one (iso-preleoheterin) were isolated from the leaves of Leonurus japonicus, in addition to the previously reported preleoheterin. The structure elucidations were made based on analysis of their spectroscopic data.
authors.affiliation: Grupo de Química Ecológica, Departamento de Química, Facultad de Ciencias, Universidad de Los Andes, Mérida 5101, Venezuela.
authors.forename: Román R
authors.initials: RR
authors.lastname: Romero-González
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Avila-Núñez
authors.forename: Lianne
authors.initials: L
authors.lastname: Aubert
authors.forename: Miguel E
authors.initials: ME
authors.lastname: Alonso-Amelot
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D031332:Leonurus / Q000737:chemistry*; D008968:Molecular Conformation; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry
chemical_list: C512947:13-epi-preleoheterin; D004224:Diterpenes; D010936:Plant Extracts; C512946:leojaponin