title: Iridoid glycosides from Thunbergia grandiflora.
abstract: The novel iridoid glycosides, isounedoside and grandifloric acid, were isolated from Thunbergia grandiflora. Grandifloric acid contains C-10 as a carboxylic acid group, the presence of which was predicted by recent iridoid biosynthesis studies carried out within T. alata. Isounedoside contains a rare 6,7-epoxide functional group. A revision in some of the NMR spectral assignments for the known iridoid glycoside alatoside was also made.
authors.affiliation: Department of Chemistry, Colorado State University, Fort Collins 80523, USA.
authors.forename: L D
authors.initials: LD
authors.lastname: Ismail
authors.forename: M M
authors.initials: MM
authors.lastname: el-Azizi
authors.forename: T I
authors.initials: TI
authors.lastname: Khalifa
authors.forename: F R
authors.initials: FR
authors.lastname: Stermitz
mesh_terms: D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D010936:Plant Extracts; D010946:Plants, Medicinal; D011714:Pyrans / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D004224:Diterpenes; D005960:Glucosides; D010936:Plant Extracts; D011714:Pyrans; C100526:isounedoside; C007885:grandifloric acid