Description:
<jats:title>Abstract</jats:title><jats:p>Combined utilization of <jats:sup>1</jats:sup>H<jats:sup>1</jats:sup>H homonuclear and <jats:sup>1</jats:sup>H<jats:sup>13</jats:sup>C heteronuclear NMR chemical shift correlations, two‐dimensional <jats:italic>J</jats:italic>‐resolved <jats:sup>1</jats:sup>H NMR measurements and homonuclear <jats:sup>1</jats:sup>H double resonance experiments allowed specific assignments for both <jats:sup>1</jats:sup>H and <jats:sup>13</jats:sup>C NMR frequencies to be made for the tricyclic sesquiterpene cyperene. The results also provided information on the conformation of the six‐membered ring of this natural product, which was recognized as a distorted chair.</jats:p>