1H and 13C NMR assignments for two new cordiaquinones from roots of Cordia leucocephala.
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.
Diniz
Jaécio Carlos
JC
Departamento de Química, Universidade do Estado do Rio Grande do Norte, 59610-210, Mossoró-RN, Brazil.
Viana
Francisco Arnaldo
FA
Oliveira
Odaci Fernandes
OF
Maciel
Maria Aparecida M
MA
Torres
Maria da Conceição de Menezes
Mda C
Braz-Filho
Raimundo
R
Silveira
Edilberto R
ER
Pessoa
Otília Deusdênia L
OD
D002247:Carbon Isotopes; D031213:Cordia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009285:Naphthoquinones / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry
D002247:Carbon Isotopes; D009285:Naphthoquinones