New <i>α</i>-ditetralonyl glucoside from the green walnut husk of <i>Juglans mandshurica</i>

<p>One new <i>α</i>-ditetralonyl glucoside (<b>1)</b>, was isolated from the green walnut husk of <i>Juglans mandshurica</i> (Juglandaceae), together with twelve known compounds (<b>2–13</b>). The structure of the new compound was determined as (2<i>R</i>,4<i>S</i>,10<i>S</i>,12<i>S</i>)-2-[7-(12,13,16-trihydroxy-<i>α</i>-tetralonyl-13-<i>O</i>-<i>β</i>-D-glucopyranoside)]- 4,8-dihydroxy-<i>α</i>-tetralone-4-<i>O</i>-<i>β</i>-D-glucopyranoside (<b>1</b>), on the basis of detailed spectroscopic analyses, and acidic hydrolysis. Compounds <b>6</b>, <b>7</b> and <b>11</b> were isolated from the genus <i>Juglans</i> for the first time. Compound <b>1–13</b> showed weak cytotoxic against A549 and HeLa cell lines.</p>