title: Minor ent-abietane diterpenoids from Euphorbia guyoniana.
abstract: Three new abietane-type diterpenoids: ent-abieta-8,11,13-trien-16-ol (1), ent-abieta-8,11,13-trien-11,16-diol (2) and 11,12-dihydroxy-7-oxo-ent-abieta-8,11,13-trien-16-oic acid methyl ester (3), in addition to three known triterpenoids: euphol (4), 24,25-epoxycycloartanol (5) and beta-sitosterol O-beta-D-glucoside (6) were isolated from the chloroform extract of the roots of Euphorbia guyoniana. Structures of the isolated compounds were established on the basis of spectroscopic analyses, including 1D and 2D homo and heteronuclear NMR experiments and ESIMS, and comparison with literature data.
authors.affiliation: Laboratoire de Chimie et Chimie de l'Environnement (L.C.C.E), Département de Chimie, Faculté des Sciences, Université de Batna, Batna 05000, Algeria. haba.hamada@yahoo.fr
authors.forename: Hamada
authors.initials: H
authors.lastname: Haba
authors.affiliation: Centre de Recherche sur les Substances Naturelles, UMS CNRS 2597, 3 rue des Satellites, BP 94244, 31432 Toulouse, France.
authors.forename: Laurence
authors.initials: L
authors.lastname: Marcourt
authors.affiliation: Laboratoire de Chimie et Chimie de l'Environnement (L.C.C.E), Département de Chimie, Faculté des Sciences, Université de Batna, Batna 05000, Algeria.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Benkhaled
authors.affiliation: Centre de Recherche sur les Substances Naturelles, UMS CNRS 2597, 3 rue des Satellites, BP 94244, 31432 Toulouse, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Long
mesh_terms: D045784:Abietanes / Q000737:chemistry / Q000302:isolation & purification*; D028481:Euphorbia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000032:analysis; D018517:Plant Roots / Q000737:chemistry
chemical_list: D045784:Abietanes; D010936:Plant Extracts