title: 1H and 13C NMR signal assignment of cucurbitacin derivatives from Citrullus colocynthis (L.) Schrader and Ecballium elaterium L. (Cucurbitaceae).
abstract: 2D NMR-derived 1H and 13C NMR signal assignments of six structurally closely related cucurbitacin derivatives are presented. The investigated 2-O-beta-D-glucopyranosylcucurbitacins I, J, K, and L were obtained from Citrullus colocynthis (L.) Schrader whereas the aglyca cucurbitacin E and I were isolated from Ecballium elaterium L.
authors.affiliation: Institute of Pharmacy, Department of Pharmacognosy, University of Innsbruck, Innrain 52, A-6020 Innsbruck, Austria.
authors.forename: Christoph
authors.initials: C
authors.lastname: Seger
authors.forename: Sonja
authors.initials: S
authors.lastname: Sturm
authors.forename: Maria-Elisabeth
authors.initials: ME
authors.lastname: Mair
authors.forename: Ernst P
authors.initials: EP
authors.lastname: Ellmerer
authors.forename: Hermann
authors.initials: H
authors.lastname: Stuppner
mesh_terms: D002247:Carbon Isotopes; D029773:Citrullus / Q000737:chemistry*; D019662:Cucurbitaceae / Q000737:chemistry*; D054728:Cucurbitacins; D009682:Magnetic Resonance Spectroscopy / Q000379:methods* / Q000592:standards*; D008968:Molecular Conformation; D011522:Protons; D012015:Reference Standards; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D011522:Protons; D014315:Triterpenes; D054728:Cucurbitacins