ent-Labdane diterpenes from the aquatic plant Potamogeton pectinatus.
Four new ent-labdane diterpenes were isolated from the freshwater aquatic plant Potamogeton pectinatus, together with two known furano-ent-labdanes. The new compounds were assigned the structures methyl-15,16-epoxy-12(R)-acetoxy- 8(17), 13(16),14-ent-labdatrien-19-oate,15,16-epoxy-12(R)-acetoxy-8(17), 13(16),14-ent-labdatrien-19-oic acid, 8(17),13-ent-labdadien-15 --> 16-lactone-19-oic acid and 16-hydroxy-8(17),13-ent-labdadien-15,16-olid-19-oic acid by spectroscopic means. Some of these labdanes showed a strong algicidal activity against Raphidocelis subcapitata.
Waridel
Patrice
P
Institut de Pharmacognosie et Phytochimie, Université de Lausanne, CH-1015 Lausanne, Switzerland.
Wolfender
Jean-Luc
JL
Lachavanne
Jean-Bernard
JB
Hostettmann
Kurt
K
D000460:Chlorophyta / Q000187:drug effects / Q000254:growth & development; D002853:Chromatography, Liquid / Q000379:methods; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification* / Q000494:pharmacology; D020128:Inhibitory Concentration 50; D013058:Mass Spectrometry / Q000379:methods; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods; D031821:Potamogetonaceae / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
D004224:Diterpenes; C433017:labdane