A new catechin derivative from the fruits of <i>Rosa sterilis</i> S. D. Shi

<p>A new catechin derivative named as sterilin A (<b>1</b>), and three known compounds, (+)-catechin (<b>2</b>), kaji-ichigoside F1 (<b>3</b>) and 2α,3α,19α-trihydroxyurs-12-en-28-oic acid-28-<i>O</i>-β-D-xylopyranosyl-(1 → 2)-β-D-glucopyranoside (<b>4</b>), was isolated from the fresh fruits of <i>Rosa sterilis</i>. Their structures were elucidated by means of extensive spectroscopic analysis and by comparison with data reported in the literatures.