title: Triterpene saponins from clematis mandshurica.
abstract: Four new triterpene saponins, clematomandshurica saponins A-D (1-4), together with three known saponins (5-7) have been isolated from the roots and rhizomes of Clematis mandshurica. Their structures were elucidated on the basis of their spectroscopic evidence and hydrolysis. Clematomandshurica saponins A and B showed significant inhibitory activity on cyclooxygenase-2 (IC50 = 2.66 and 2.58 microM, respectively).
authors.affiliation: School of Pharmaceutical Sciences, Peking University Health Science Center, No. 38 Xueyuan Road, Beijing 100083, People's Republic of China.
authors.forename: Shepo
authors.initials: S
authors.lastname: Shi
authors.forename: Dan
authors.initials: D
authors.lastname: Jiang
authors.forename: Caixia
authors.initials: C
authors.lastname: Dong
authors.forename: Pengfei
authors.initials: P
authors.lastname: Tu
mesh_terms: D000818:Animals; D039324:Clematis / Q000737:chemistry*; D052246:Cyclooxygenase 2 Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D020128:Inhibitory Concentration 50; D017737:Macrophages, Peritoneal / Q000187:drug effects; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D052246:Cyclooxygenase 2 Inhibitors; D004365:Drugs, Chinese Herbal; D012503:Saponins; D014315:Triterpenes