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Note | Regular issue | Vol 60, No. 8, 2003, pp.1881-1889
Published online, 16th June, 2003
DOI: 10.3987/COM-03-9787
Constituents of the Leaves of Petasites formosanus and Their Antioxidative Activity

Chun-Hua Lin, Chia-Ying Li, Chang-Sheng Kuoh, and Tian-Shung Wu*

*Department of Chemistry, Natioanl Cheng Kung University, 1. Ta-Shiueh Rd., Tainan, 70101, Taiwan, R.O.C.

Abstract

Three new naturally occurring phenylpropenoyl derivatives, sodium dupracine (1), (E)-dupracine methyl ester (2), (Z)-dupracine methyl ester (3), together with eight known compounds, were isolated from the leaves of Petasites formosanus. Their structures were established by spectral methods and chemical transformations. The isolated compounds showed significant antioxidative activity in DPPH radical scavenging assay.