A new 3,4-<i>seco</i>-cycloartane from the leaves of <i>Hopea odorata</i> Roxb.

<div><p>A new 3,4-<i>seco</i>-cycloartane, identified as (24<i>R</i>,25<i>S</i>)-dihydroxy-26-<i>O</i>-nonadecylcarbonyloxy-3,4-secocycloarta-4(28)-en-3-oic acid (<b>1</b>), has been isolated from the leaves of <i>Hopea odorata</i> Roxb. (Dipterocarpaceae), together with the rare 3,4-<i>seco</i>-cycloart-4(28),24-diene-3,26-dioic acid (<b>2</b> or abiesatrine J) and six other known compounds (<b>3</b>–<b>8</b>). Their structures were elucidated on the basis of both chemical and spectroscopic methods.</p></div