Novel C-Geranyl 7-Hydroxycoumarins from the Aerial Parts of Eriostemon tomentellus

Mohammad A. Rashid, James A. Armstrong, Alexander I. Gray, Peter G. Waterman
1992 Zeitschrift für Naturforschung. B, A journal of chemical sciences  
From the aerial parts of Eriostemon tomentellus five coumarins have been isolated. These have been characterized as ostruthin (6-geranyl-7-hydroxycoumarin (1)) and the novel compounds, 8-geranyl-7-hydroxycoumarin (2), (E)-6-(7-hydroxy-3,7-dimethylocta-2,5-dienyl)- 7-hydroxycoumarin (3), (E)-6-(7-hydroperoxy-3,7-dimethylocta-2,5-dienyl)-7-hydroxycoumarin (4), and 6-(6-hydroxy-3,7-dimethylocta-2,7-dienyl)-7-hydroxycoumarin (5). In addition tembamide
more » ... xy-N-benzoylethylamine (6 ) was isolated and the l3C NMR spectrum reported for the first time.
doi:10.1515/znb-1992-0221 fatcat:bpbmquijnbhlzkyltzmxw7j4li