Two new triterpene saponins from the anti-inflammatory saponin fraction of Ilex pubescens root.
The saponin fraction from the ethanolic extracts of the root of Ilex pubescens Hook. et Arn. (Ilexaceae) was found to exhibit potent anti-inflammatory effects on carrageenan-induced paw edema in rats. Two novel triterpene saponins, pubescenosides C and D (1 and 2, resp.), together with five known saponins were isolated from this saponin fraction. The structures of 1 and 2 were elucidated as (20beta)-3-O-[beta-D-glucopyranosyl-(1-->2)-beta-D-xylopyranosyl]ursa-12,18-dien-28-oic acid 28-O-beta-D-glucopyranosyl ester, and (20beta)-3-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranosyl-(1-->2)-beta-D-xylopyranosyl]ursa- 12,18-dien-28-oic acid 28-O-beta-D-glucopyranosyl ester, respectively, on the basis of chemical and spectroscopic data. Five known saponins isolated from the saponin fraction were identified as ilexsaponin B(1), B(2), B(3), A(1), and chikusetsusaponin IV(a).
Wang
Jing-Rong
JR
School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Hong Kong.
Zhou
Hua
H
Jiang
Zhi-Hong
ZH
Liu
Liang
L
D000818:Animals; D000893:Anti-Inflammatory Agents / Q000302:isolation & purification* / Q000627:therapeutic use; D002351:Carrageenan; D004487:Edema / Q000139:chemically induced / Q000188:drug therapy; D030017:Ilex / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D018517:Plant Roots / Q000737:chemistry*; D051381:Rats; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification* / Q000627:therapeutic use
D000893:Anti-Inflammatory Agents; D012503:Saponins; C531473:pubescenoside C; C531474:pubescenoside D; D002351:Carrageenan