Acylated manoyl oxide diterpenes of Stemodia trifoliata.
Two new labdane diterpenes, 6alpha-malonyloxy-ethyl ester manoyl oxide and bis-6alpha-dioxymanoylmalonate, together with the known 6alpha-hydroxymanoyl oxide, 6alpha-malonyloxymaloyl oxide and betulinic acid were isolated from leaves of Stemodia trifoliata. Their structures were elucidated by spectroscopic studies (IR and HR-ESI-MS), including an extensive NMR (COSY, HSQC, HMBC and NOESY) analysis.
da Silva
Wildson Max B
WM
Departamento de Química Orgânica e Inorgânica, Centro de Ciências, Universidade Federal do Ceará, CP 12200, 60021-970 Fortaleza, Ceará, Brazil.
Silveira
Edilberto R
ER
Pessoa
Otilia Deusdênia L
OD
D000215:Acylation; D004224:Diterpenes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D010936:Plant Extracts / Q000737:chemistry*; D028083:Scrophulariaceae / Q000737:chemistry*
D004224:Diterpenes; D010936:Plant Extracts; C475535:manoyl oxide