Terpenoids from Guarea guidonia.
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.
Lago
João Henrique G
JH
Instituto de Química, Universidade de São Paulo CP 26077, CEP 05599-970, São Paulo, SP, Brazil. joaolago@iq.usp.br
Brochini
Cláudia B
CB
Roque
Nídia F
NF
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
D010936:Plant Extracts; D013729:Terpenes