title: Triterpene saponins and iridoid glucosides from galium rivale.
abstract: Three new glycosides of the oleanene-type triterpenes, rivalosides C-E (1-3), along with three known triterpene saponins, momordin IIb (4) and rivalosides A-B (5-6), and five known iridoid glucosides: monotropein, scandoside, deacetylasperulosidic acid, geniposidic acid and asperulosidic acid, were isolated from aerial parts of Galium rivale. The structures of the new compounds were elucidated by spectral methods and chemical means as 2alpha-acetoxy-3alpha, 19alpha-dihydroxy-olean-12-en-28-oic acid 28-O-beta-D-glucopyranosyl-(1--> 6)-beta-D-glucopyranoside, 2alpha,3alpha, 19alpha-trihydroxy-olean- 12-en-28-oic acid 28-O-beta-D-glucopyranosyl-(1 --> 6)-beta-D-glucopyranoside and 3-O-beta-D-glucuronopyranosyl-24-hydroxy-olean-12-en-28-oic acid 28-O-beta-D-glucopyranoside, for rivalosides C-E, respectively. The taxonomic significance of the rivalosides in G. rivale was discussed.
authors.affiliation: Istituito per la Chimica di Molecole di Interesse Biologico del CNR, Napoli, Italy. sderosa@icmib.na.cnr.it
authors.forename: S
authors.initials: S
authors.lastname: de Rosa
authors.forename: C
authors.initials: C
authors.lastname: Iodice
authors.forename: M
authors.initials: M
authors.lastname: Mitova
authors.forename: N
authors.initials: N
authors.lastname: Handjieva
authors.forename: S
authors.initials: S
authors.lastname: Popov
authors.forename: M
authors.initials: M
authors.lastname: Anchev
mesh_terms: D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D019666:Rubiaceae / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013057:Spectrum Analysis; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D005960:Glucosides; D012503:Saponins; D014315:Triterpenes