title: Structure elucidation of casbane diterpenes from Croton argyrophyllus.
abstract: Two novel casbane diterpenes 1-hydroxy-(2E,6Z,12E)-casba-2,6,12-triene-4,5-dione (1) and 6E,12E-casba-1,3,6,12-tetraen-1,4-epoxy-5-one (2) were isolated from the ethanol extract of the stems of Croton argyrophyllus. Structural characterization including the relative stereochemistry of all compounds was established on the basis of spectroscopic methods, mainly 1D and 2D NMR, and HRESIMS.
authors: Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, CP 12.200, 60.021-970, Fortaleza, CE, Brazil.
authors: Francisco Artur
authors: FA
authors: e Silva-Filho
authors: Raimundo
authors: R
authors: Braz-Filho
authors: Edilberto Rocha
authors: ER
authors: Silveira
authors: Mary Anne Sousa
authors: MA
authors: Lima
mesh_terms: D029802:Croton / Q000737:chemistry*; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000592:standards; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry*; D012015:Reference Standards; D013237:Stereoisomerism
chemical_list: D004224:Diterpenes; D010936:Plant Extracts