title: Triterpenoids from Drypetes chevalieri Beille (euphorbiaceae).
abstract: The CH2Cl2/CH3OH (1/1) extract of the dried stem of Drypetes chevalieri Beille afforded two new triterpenoïds named drypechevalin A (11-oxo-beta-amyrin-3beta-ylcaffeate) and drypechevalin B (3,7-dioxo-D:A-friedooleanan-24-al) along with five known compounds: lupeol, lupeone, erythrodiol, putranjivadione, friedelin. Their structures were established on the basis of spectroscopic analysis and chemical evidence.
authors.affiliation: Faculty of Science, Department of Chemistry, University of Douala, P.O. Box 24157, Douala, Cameroon. jdwansi@yahoo.fr
authors.forename: J D
authors.initials: JD
authors.lastname: Wansi
authors.forename: J
authors.initials: J
authors.lastname: Wandji
authors.forename: W A F
authors.initials: WA
authors.lastname: Kamdem
authors.forename: J C
authors.initials: JC
authors.lastname: Ndom
authors.forename: H E
authors.initials: HE
authors.lastname: Ngeufa
authors.forename: D D
authors.initials: DD
authors.lastname: Chiozem
authors.forename: J
authors.initials: J
authors.lastname: Chi Shirri
authors.forename: M I
authors.initials: MI
authors.lastname: Choudhary
authors.forename: N
authors.initials: N
authors.lastname: Tsabang
authors.forename: F
authors.initials: F
authors.lastname: Tillequin
authors.forename: Z T
authors.initials: ZT
authors.lastname: Fomum
mesh_terms: D002109:Caffeic Acids / Q000737:chemistry / Q000302:isolation & purification; D019665:Euphorbiaceae / Q000737:chemistry*; D006868:Hydrolysis; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018547:Plant Stems / Q000737:chemistry; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared
chemical_list: D002109:Caffeic Acids; D012717:Sesquiterpenes