title: Verbascoside derivatives and iridoid glycosides from Penstemon crandallii.
abstract: The new phenylethanoid glycosides 2-O-acetyl-3'''-O-methylverbascoside and 2,4"-di-O-acetyl-3'''-O-methylverbascoside were isolated and identified from Penstemon crandallii. The major iridoid glycoside was plantarenaloside and no aucubin type iridoids were found. This contrasted with a previous analysis of P. teucrioides, from the same Penstemon subsection, which was dominated by aucubin derivatives.
authors.affiliation: Department of Pharmacognosy, Al-Azhar University, Nasr City, Cairo, Egypt.
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: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D008958:Models, Molecular; D008968:Molecular Conformation; D008969:Molecular Sequence Data; D015394:Molecular Structure; D010636:Phenols; D010936:Plant Extracts; D010944:Plants / Q000737:chemistry*; D013329:Structure-Activity Relationship; D059808:Polyphenols
chemical_list: D005960:Glucosides; D006027:Glycosides; D010636:Phenols; D010936:Plant Extracts; C058956:acteoside; D059808:Polyphenols