title: A new iridoid glycoside from Vitex negundo Linn (Verbenacea).
abstract: Five compounds have been isolated from the leaves of Vitex negundo Linn (Verbenacea) and their structures established by spectral analysis. Compound 1 has been identified and characterised as a new iridoid with a novel structure which has never before been reported in literature from Vitex or any other source. Its structure has been established as 1,4a,5,7a-tetrahydro-1-beta-D-glucosyl-7-(3',4'-dihydroxybenzoyloxymethyl)-5-ketocyclopenta[c]pyran-4-carboxylic acid. Other compounds, 2, 3, 4 and 5, have been identified as luteolin-7-O-beta-D glucoside, nishindaside, negundoside, and agnuside, respectively. Compound 2, a flavone-O-glycoside, is being reported from this plant for the first time, and compounds 3, 4 and 5 are structurally known iridoids.
authors.affiliation: Department of Chemistry, University of Jammu, Jammu-180004, India. rlsharma_hod@rediffmail.com
authors.forename: Rattan L
authors.initials: RL
authors.lastname: Sharma
authors.forename: Anil
authors.initials: A
authors.lastname: Prabhakar
authors.forename: Kanaya L
authors.initials: KL
authors.lastname: Dhar
authors.forename: Anand
authors.initials: A
authors.lastname: Sachar
mesh_terms: D006027:Glycosides / Q000737:chemistry*; D039823:Iridoids / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D020950:Vitex / Q000737:chemistry*
chemical_list: D006027:Glycosides; D039823:Iridoids