Studies on the chemical constituents of Nardostachys jatamansi DC (Valerianaceae)

A new sesquiterpene acid, nardin and a new pyranocoumarin have been isolated from the rhizomes of Nardostachys jatamansi and characterized as E-2-methyl, 3-(5,9-dimethylbicyclo[4.3.0]-nonen-9-yl)-2-propenoic acid and 2',2'-dimethyl-3'-methoxy-3',4'-dihydropyranocoumarin, respectively using spectral studies and chemical correlation. The stereochemistry of nardin has been determined using X-ray crystallographic studies.