Pinguisane-type sesquiterpenes from the South American liverwort Porella recurva (Taylor) Kuhnemann.
The chemical composition of a dichloromethane extract of the South American liverwort Porella recurva has been examined. Two new pinguisane-type norsesquiterpenoid natural products were isolated: 6,11-epoxy-15-nor-3,4-dioxo-5,10-pinguisadien-12-acetate and 6,11-epoxy-15-nor-4-oxo-5,10-pinguisadien-12-acetate. In addition two known pinguisane-type sesquiterpenes were also isolated: norpinguisone and norpinguisone methyl ester. All structures were elucidated by means of NMR spectroscopic techniques and mass spectrometry.
van Klink
John W
JW
FR 12.3, Pharmakognosie und Analytische Phytochemie, Universität des Saarlandes, Saarbrücken, Germany.
Zapp
Josef
J
Becker
Hans
H
D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida / Q000737:chemistry*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry* / Q000302:isolation & purification; D013020:South America
D010936:Plant Extracts; D012717:Sesquiterpenes