title: 1H and 13C NMR assignments for two new cordiaquinones from roots of Cordia leucocephala.
abstract: From the roots of Cordia leucocephala (Boraginaceae), two new meroterpenoid naphthoquinones, 6-[10-(12,12-dimethyl-13alpha-hydroxy-16-methenyl-cyclohexyl)ethyl]-1,4-naphthalenedione (cordiaquinone L) and 5-methyl-6-[10-(12,12-dimethyl-13beta-hydroxy-16-methenyl-cyclohexyl)methyl-1,4-naphthalenedione (cordiaquinone M) were isolated. Their structures were elucidated after detailed 1D and 2D NMR (COSY, HSQC, HMBC and NOESY) data analyses and comparison with literature data for analogous compounds.
authors.affiliation: Departamento de Química, Universidade do Estado do Rio Grande do Norte, 59610-210, Mossoró-RN, Brazil.
authors.forename: Jaécio Carlos
authors.initials: JC
authors.lastname: Diniz
authors.forename: Francisco Arnaldo
authors.initials: FA
authors.lastname: Viana
authors.forename: Odaci Fernandes
authors.initials: OF
authors.lastname: Oliveira
authors.forename: Maria Aparecida M
authors.initials: MA
authors.lastname: Maciel
authors.forename: Maria da Conceição de Menezes
authors.initials: Mda C
authors.lastname: Torres
authors.forename: Raimundo
authors.initials: R
authors.lastname: Braz-Filho
authors.forename: Edilberto R
authors.initials: ER
authors.lastname: Silveira
authors.forename: Otília Deusdênia L
authors.initials: OD
authors.lastname: Pessoa
mesh_terms: D002247:Carbon Isotopes; D031213:Cordia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009285:Naphthoquinones / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry
chemical_list: D002247:Carbon Isotopes; D009285:Naphthoquinones