8.

Chemical Constituents from Erigeron bonariensis L. and their Chemotaxonomic Importance

Aqib Zahoor, Hidayat Hussain, Afsar Khan, Ishtiaq Ahmed, Viqar Uddin Ahmad and Karsten Krohn

Department of Chemistry, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany

Department of Biological Sciences and Chemistry, University of Nizwa, P.O Box 33, Postal Code 616, Birkat Al Mauz, Nizwa, Sultanate of Oman

Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad-22060, Pakistan.

H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan.

Abstract: The study of the chemical constituents of the whole plant of Erigeron bonariensis (L.) has resulted in the isolation and characterization of a new and nine known compounds. The known compounds were identified as stigmasterol (1), freideline (2), 1, 3-dihydroxy-3R,5R-dicaffeoyloxy cyclohexane carboxylic acid methyl ester (3),1 R ,3R-dihydroxy-4S,5R-dicaffeoyloxycyclohexane carboxylic acid methyl ester (4), quercitrin (5), caffeic acid (6), 3-(3,4-dihydroxyphenyl)acrylic acid 1-(3,4-dihydroxyphenyl)-2-methoxycarbonylethyl ester (8), benzyl O-β-D-glucopyranoside (9), and 2-phenylethyl-β-D-glucopyranoside (10). The aromatic glycoside, erigoside G (7) is reported as new natural compound. The above compounds were individually identified by spectroscopic analyses and comparisons with reported data. The chemotaxonomic studies of isolated compounds have been discussed.

Keywords: Erigeron bonariensis ; natural products; chemotaxonomic studies.