title: Novel sphingolipids from Conyza canadensis.
abstract: New sphingolipids, 1,3,5-trihydroxy-2-hexadecanoylamino-(6E,9E)-heptacosdiene (1). 1,3,5-trihydroxy-2-hexadecanoylamino-(6E,9E)-heptacosdiene-1-O-glucopyranoside (2). 1,3-dihydroxy-2-hexanoylamino-(4E)-heptadecene (3). have been isolated from Conyza canadensis, along with five known compounds, p-hydroxybenzoic acid, 3,5-dihydroxybenzoic acid, 3,5-dimethoxybenzoic acid, 3beta-hydroxyolean-12-en-28-oic acid, and 3beta-erythrodiol, isolated for the first time from this species. Their structures were determined by spectroscopic methods ((1)H- and (13)C-NMR, IR and MS) and two dimensional (2D)-NMR experiments.
authors.affiliation: International Centre for Chemical Sciences, HEJ Research Institute of Chemistry, University of Karachi, Pakistan.
authors.forename: Naveen
authors.initials: N
authors.lastname: Mukhtar
authors.forename: Kiran
authors.initials: K
authors.lastname: Iqbal
authors.forename: Abdul
authors.initials: A
authors.lastname: Malik
mesh_terms: D035401:Conyza / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010154:Pakistan; D010946:Plants, Medicinal / Q000737:chemistry; D013107:Sphingolipids / Q000302:isolation & purification*
chemical_list: D013107:Sphingolipids