title: Terpenoids from Guarea guidonia.
abstract: The volatile oil and the methanol extract from the leaves of Guarea guidonia, Meliaceae, were individually submitted to chromatographic separation. A sesquiterpene (2S*)-eudesma-5,7-dien-2-ol, together with six known ones, were isolated from the volatile oil. The methanolic extract afforded two known and two new triterpenes (23S*)-cycloart-24-ene-3 beta,23-diol and (23R*)-cycloart-24-ene-3 beta,23-diol, besides three known sesquiterpenes, one known diterpene and two steroids. Their structures were established on the basis of spectrocopic data, mainly by 1H and 13C NMR spectroscopic analyses.
authors.affiliation: Instituto de Química, Universidade de São Paulo CP 26077, CEP 05599-970, São Paulo, SP, Brazil. joaolago@iq.usp.br
authors.forename: João Henrique G
authors.initials: JH
authors.lastname: Lago
authors.forename: Cláudia B
authors.initials: CB
authors.lastname: Brochini
authors.forename: Nídia F
authors.initials: NF
authors.lastname: Roque
mesh_terms: D001938:Brazil; D005591:Chemical Fractionation / Q000379:methods; D002845:Chromatography / Q000379:methods; D029582:Meliaceae / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D010936:Plant Extracts; D013729:Terpenes