Abstract
Three new triterpene saponins, ilexsaponins D–F (1–3), were isolated from the roots of Ilex pubescens. Their structures were elucidated as 3-O-β-d-glucopyranosyl(1 → 3)-α-l-arabinopyranosyl urs-12,18-diene-24,28-dioic acid 28-O-β-d-glucopyranoside (1), 3-O-β-d-glucopyranosyl(1 → 3)-α-l-arabinopyranosyl urs-12,18-diene-24,28-dioic acid (2), and 3-O-β-d-glucopyranosyl(1 → 3)-α-l-arabinoyranosyl-30-hydroxyurs-12,19-diene-24,28-dioic acid 28-O-β-d-glucopyranoside (3) on the basis of the chemical and spectroscopic evidence.
Acknowledgments
This work was financially supported by the Youth Fund of Sichuan Province Office of Education (08Z6012), the Chun Hui Project of Ministry of Education (Z2010103), and the Innovation Fund of Postgraduate, Xihua University (YCJJ201243).