<jats:p><jats:bold>Aristoserratine, a New Indole Alkaloid from Aristotelia serrata W.R.B. O<jats:sc>LIVER</jats:sc> and from A. peduncularis (L<jats:sc>ABILL</jats:sc>.) H<jats:sc>OOK</jats:sc>. F.</jats:bold><jats:p>The new indole alkaloid aristoserratine <jats:bold>(2)</jats:bold> has been isolated from <jats:italic>Aristotelia.</jats:italic> Its structure and absolute configuration were elucidated on the basis of spectroscopic data.