Studies on the constituents of Atractylodes lancea.

Abstract
From the polar portion of the methanolic extract of the fresh rhizomes of Atractylodes lancea DC., nine new sesquiterpene glycosides [two guaiane-type glycosides, atractylosides A and B (1 and 2), and seven eudesmane-type glycosides, atractylosides C, D, E, F, G, H and I (3-9)] were obtained and their structures were characterized by enzymatic hydrolysis, spectroscopic means and X-ray analysis.

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