A new guaianolide sesquiterpene lactone from <i>Curcuma leucorrhiza</i> Roxb.

<div><p>A naturally occurring guaianolide sesquiterpene lactone (<b>1</b>), along with 10 known compounds (<b>2</b>–<b>11</b>), was isolated from the chloroform extract of the dried rhizomes of <i>Curcuma leucorrhiza</i> Roxb. Their structures were elucidated on the basis of spectroscopic studies and X-ray crystallographic analysis. Compound <b>1</b> expressed antioxidant activity. The taxonomic status of <i>C. leucorrhiza</i> is briefly discussed based on the chemotaxonomic significance of these findings.</p></div>

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