title: Bufadienolides from Urginea maritima from Egypt.
abstract: Forty-one bufadienolides were isolated from the bulbs of Urginea maritima agg. from Egypt; 26 of them are new natural compounds. Structure elucidation was performed by comparison with authentic substances or by means of 1H, 13C NMR and FAB mass spectroscopy. Sixteen of the glycosides derive from nine structurally new aglycones: 16 beta-hydroxy-scillarenin, 16 beta-O-acetyl- scillarenin, 12 beta-hydroxy-5 alpha-4,5-dihydro-scillirosidin, 16 beta- hydroxy-5 alpha-4,5-dihydro-scillirosidin, 16 beta-O-acetyl-5 alpha-4,5- dihydro-scillirosidin, 12 beta-hydroxy-scillirubrosidin, 16 beta-O-acetyl- scillirubrosidin, 9-hydroxy-scilliphaeosidine and 12 beta-hydroxy-desacetyl- scillirosidine.
authors.affiliation: Institute of Pharmacognosy, University of Vienna, Austria.
authors.forename: B
authors.initials: B
authors.lastname: Kopp
authors.forename: L
authors.initials: L
authors.lastname: Krenn
authors.forename: M
authors.initials: M
authors.lastname: Draxler
authors.forename: A
authors.initials: A
authors.lastname: Hoyer
authors.forename: R
authors.initials: R
authors.lastname: Terkola
authors.forename: P
authors.initials: P
authors.lastname: Vallaster
authors.forename: W
authors.initials: W
authors.lastname: Robien
mesh_terms: D002018:Bufanolides; D002770:Cholenes / Q000737:chemistry* / Q000302:isolation & purification; D004534:Egypt; D006027:Glycosides; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D010936:Plant Extracts; D018517:Plant Roots; D010946:Plants, Medicinal; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D002018:Bufanolides; D002770:Cholenes; D006027:Glycosides; D010936:Plant Extracts; C087925:bufadienolide