title: Diterpenoids from the aerial parts of Plectranthus ornatus.
abstract: Phytochemical investigation of a hexane extract of the aerial parts of Plectranthus ornatus yielded three new neoclerodane diterpenoids (1-3), two labdane diterpenes (4 and 5) obtained for the first time as natural products, and several previously known substances. The structures and relative stereochemistry of 1-5 were established mainly on the basis of NMR spectroscopic studies and by comparison with related compounds.
authors.affiliation: Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, CEP 31270-901, Belo Horizonte, MG, Brazil. patimo@uai.com.br
authors.forename: Patrícia M
authors.initials: PM
authors.lastname: Oliveira
authors.forename: Alexandre A
authors.initials: AA
authors.lastname: Ferreira
authors.forename: Dâmaris
authors.initials: D
authors.lastname: Silveira
authors.forename: Rosemeire B
authors.initials: RB
authors.lastname: Alves
authors.forename: Gilberto V
authors.initials: GV
authors.lastname: Rodrigues
authors.forename: Vicente P
authors.initials: VP
authors.lastname: Emerenciano
authors.forename: Délio S
authors.initials: DS
authors.lastname: Raslan
mesh_terms: D001938:Brazil; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D031346:Plectranthus / Q000737:chemistry*
chemical_list: C501039:11R*-acetoxy-2-oxo-neocleroda-3,13E-dien-15-oic acid; C501040:11R*-acetoxy-3beta-hydroxyneocleroda-4(18),13E-dien-15-oic acid; C501038:11R*-acetoxyneocleroda-3,13E-dien-15-oic acid; D004224:Diterpenes