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Two New Pseudoguaianolides from the Flowers of Parthenium hysterophorus
Author(s) -
Das Biswanath,
Reddy Kongara Ravinder,
Ravikanth Bommena,
Sarma Akella Venkata Subrahmanya,
Sridhar Balasubramanian
Publication year - 2008
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200890122
Subject(s) - parthenium hysterophorus , chemistry , parthenium , stereochemistry , botany , weed , biology
Chemical investigation on two samples of the flowers of Parthenium hysterophorus afforded two new pseudoguaianolides (one from each sample) together with several known constituents. The structures of the new compounds were established by extensive spectroscopic (1D‐ and 2D‐NMR) studies. The X‐ray crystallographic analysis of one of these compounds was also accomplished.