Screening for novel plant sources of prenyloxyanthraquinones: <i>Senna alexandrina</i> Mill. and <i>Aloe vera</i> (L.) Burm. F.

<div><p>As a continuation of our ongoing studies aimed to reveal the presence of oxyprenylated anthraquinones in plants claimed to have a laxative effect, in this article, we describe the extraction and HPLC separation of madagascin (3-isopentenyloxyemodin) and 3-geranyloxyemodine from dried leaves and fruits of <i>Senna alexandrina</i> Mill. (Leguminosae) and leaves and gel of <i>Aloe vera</i> (L.) Burm. F. (Xanthorrhoeaceae). Both compounds are described herein for the first time as components of extracts of the title plants.</p>