Fitoterapia 2003-Jul
Eudesmane derivatives from Laggera pterodonta.
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A new eudesmane derivative, 4alpha,5alpha-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 beta-amyrin. Cytotoxic activity of compounds 2, 3 and 4 was investigated.