C-glycosides from the stems of <i>Calophyllum membranaceum</i>

<p>Three new C-glycosides, calophymembransides D-F (<b>1–3</b>), were isolated from the stems of <i>Calophyllum membranaceum</i> Gardn. et Champ.. The structures were assigned on the basis of spectroscopic data. RXR<i>α</i> transcriptional inhibition and <i>α</i>-glucosidase inhibition assays indicated that all the isolates were inactive.</p>