title: An echinocystic acid saponin derivative from Kalimeris shimadae.
abstract: A new triterpene saponin, shimadoside A, has been isolated from Kalimeris shimadae and its structure deduced as 3-O-beta-D-glucopyranosiduronic acid-3 beta, 16 alpha-dihydroxyolean-12-en-28-oic acid-28-O-beta-D-xylopyranosyl-(1-->3)-beta-D-xylopyranosyl-(1--> 4)-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-xylopyranoside by means of spectral data, especially NMR, including COSY, HMQC, HOHAHA and ROESY techniques, and chemical degradation.
authors.affiliation: Department of Plant Science, State University of New Jersey, New Brunswick, NJ 08903, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Shao
authors.forename: O
authors.initials: O
authors.lastname: Poobrasert
authors.forename: C T
authors.initials: CT
authors.lastname: Ho
authors.forename: C K
authors.initials: CK
authors.lastname: Chin
authors.forename: G A
authors.initials: GA
authors.lastname: Cordell
mesh_terms: D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D009828:Oleanolic Acid / Q000031:analogs & derivatives*; D018517:Plant Roots / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D016339:Spectrometry, Mass, Fast Atom Bombardment
chemical_list: D012503:Saponins; C103578:shimadoside A; D009828:Oleanolic Acid