title: Triterpenoids from Parthenium argentatum x P. tomentosa.
abstract: Four tetracyclic triterpenoids and lupeol were isolated from the hybrid Parthenium argentatum x P. tomentosa. The new triterpenoids were identified as 16, 24-epoxy-3 alpha-hydroxylanost-8-ene (argentatin E); 16, 24-epoxy-25-hydroxycycloart-1, 11, 22-trien-3-one (argentatin F); 16,24-dihydroxycycloart-20, 25-dien-3-one (argentatin G) and 16, 24-dihydroxycycloart-25-en-3-one (argentatin H). The chemical identities of these compounds were confirmed by the different spectrometric measurements.
authors.affiliation: University of Mansoura, Faculty of Pharmacy, Department of Pharmacognosy, Mansoura, Egypt 35516. galatm@mans.edu.eg
authors.forename: Galal T
authors.initials: GT
authors.lastname: Maatooq
authors.forename: Ali A H
authors.initials: AA
authors.lastname: el-Gamal
authors.forename: Todd R
authors.initials: TR
authors.lastname: Furbacher
authors.forename: Tracy L
authors.initials: TL
authors.lastname: Cornuelle
authors.forename: Joseph J
authors.initials: JJ
authors.lastname: Hoffmann
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D006824:Hybridization, Genetic; D015394:Molecular Structure; D013057:Spectrum Analysis; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D014315:Triterpenes