Abstract
A new eudesmane derivative, 4α,5α-dihydroxyeudesma-11(13)-en-12-oic acid, was isolated from Laggera pterodonta. Its structure was elucidated as ( 1) on the basis of spectroscopic evidence. Moreover, six known compounds were isolated: pterodontriol A ( 2), pterodontriol B, pterodonta acid ( 3), ilicic acid ( 4), costic acid and β-amyrin. Cytotoxic activity of compounds 2, 3 and 4 was investigated.
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