A new furanoditerpenoid marker for the distinction between the seeds of two species of Caesalpinia

Abstract

<jats:title>Abstract</jats:title><jats:p>A new cassane furanoditerpene, 17‐methylvouacapane‐8(14),‐9(11)‐diene (1), has been isolated from the seed kernels of <jats:italic>Caesalpinia crista</jats:italic> and its structure determined by mass, IR and NMR spectrometry. The <jats:sup>1</jats:sup>H‐ and <jats:sup>13</jats:sup>C‐NMR spectra were assigned using a combination of <jats:sup>1</jats:sup>H‐<jats:sup>1</jats:sup>H COSY, HSQC and HMBC two‐dimensional NMR experiments. An HPTLC method has been developed to quantify 1 in seed material. The furanoditerpene can serve as a marker chemically to differentiate <jats:italic>C. crista</jats:italic> from the synonymous <jats:italic>C. bonduc</jats:italic>. Copyright © 2003 John Wiley &amp; Sons, Ltd.