A new xanthone glycoside from <i>Pyrrosia sheareri</i>

<p>A new xanthone glycoside, 3,5,7,8-tetramethoxyxanthone-1-<i>O</i>-<i>β</i>-D-glucopyranoside (<b>1</b>), along with five known compounds, mangiferin (<b>2</b>), kaempferol (<b>3</b>), quercetin (<b>4</b>), chlorogenic acid (<b>5</b>) and diploptene (<b>6</b>), was isolated from the whole plants of <i>Pyrrosia sheareri</i> (Bak.) Ching. The structure of compound <b>1</b> was established on the basis of extensive spectroscopic analyses and chemical methods.</p> <p></p>