title: Two chromene derivatives from Calyptranthes tricona.
abstract: Two alpha-monomethyl chromene derivatives were isolated from the leaf essential oil of Calyptranthes tricona from Brazil which were characterized by 1H- and 13C-NMR. Besides these components, which represent about half of the oil, classical terpenoid structures could be identified, among which cis-beta-farnesene is the most abundant (26.6%). A biosynthetic pathway could be proposed to explain the formation of the chromene derivatives in the plant.
authors.affiliation: Université Montpellier II, France. cmenut@univ-montp2.fr
authors.forename: C
authors.initials: C
authors.lastname: Menut
authors.forename: J M
authors.initials: JM
authors.lastname: Bessiere
authors.forename: H
authors.initials: H
authors.lastname: Ntalani
authors.forename: P
authors.initials: P
authors.lastname: Verin
authors.forename: A T
authors.initials: AT
authors.lastname: Henriques
authors.forename: R
authors.initials: R
authors.lastname: Limberger
mesh_terms: D001578:Benzopyrans / Q000737:chemistry / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry* / Q000145:classification; D009822:Oils, Volatile / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry
chemical_list: C412073:5,7-dimethoxy-11,14-dimethyl-2H-benzopyran; C412074:5,7-dimethoxy-2-methyl-2H-benzopyran; D001578:Benzopyrans; D009822:Oils, Volatile