New coumarins from Pterocaulon polystachyum

Citation
N. Vera et al., New coumarins from Pterocaulon polystachyum, PLANTA MED, 67(7), 2001, pp. 674-677
Citations number
18
Language
INGLESE
art.tipo
Letter
Categorie Soggetti
Pharmacology & Toxicology
Journal title
PLANTA MEDICA
ISSN journal
0032-0943 → ACNP
Volume
67
Issue
7
Year of publication
2001
Pages
674 - 677
Database
ISI
SICI code
0032-0943(200110)67:7<674:NCFPP>2.0.ZU;2-M
Abstract
Aerial parts of Pterocaulon polystachyum from Chaco province, Argentina, af forded the known coumarins ayapin, isoscopoletin, prenyletin, prenyletin me thyl ether, virgatenol, obtusinin, 5-methoxy-6,7-methylenedioxycoumarin, 5- (3,3-dimethylallyloxy)-6,7-methylenedioxycoumarin, 5-(2,3-dihydroxy-3-methy lbutanoxy)-6,7-methylenedioxycoumarin, haplopinol methyl ether, 6-(1,1-dime thyl-2-propenyl)-7-hydroxycoumarin and demethylnieshoutin; the last two are new as natural products while the five new coumarins from the collection w ere isovirgatenol, 3'-deoxyobtusinin, 6-methoxy-7-(2'-hydroxyethoxy)-coumar in, 5-(2 -hydroxyethoxy)-6,7-methylenedioxycoumarin and a substance tentati vely identified as 5-hydroxy-6,7-methylenedioxy-8-(3,3-dimethylallyl)-couma rin.