title: Pensteminoside, an unusual catalpol-type iridoid from Penstemon gentianoides HBK (Plantaginaceae).
abstract: From the MeOH and ethyl acetate extracts of aerial parts of Penstemon gentianoides HBK (Plantaginaceae) an unusual iridoid of the catalpol-type, was isolated and characterized as pensteminoside: (8-O-trans-cinnamoyl, 6-hydroxy, 1-[beta-D-glucopyranoside-6'-O-((4''-hydroxy)-cinnamoyl)]-catalpol) was isolated, along with the known iridoids: plantarelanoside and globularisicin, the flavone: luteolin and diosmetin, as well the phenylpropanoids, verbascoside and martynoside. Their structures were established by 1D and 2D NMR spectroscopic analyses.
authors.affiliation: Phytochemistry Lab., UBIPRO, FES-Iztacala, Universidad Nacional Autónoma de México, Avenida de los Barrios s/n, Los Reyes Iztacala, Tlalnepantla, Estado de México, C. P. 54090, Mexico.
authors.forename: Mariana
authors.initials: M
authors.lastname: Domínguez
authors.forename: J Camilo
authors.initials: JC
authors.lastname: Marín
authors.forename: Baldomero
authors.initials: B
authors.lastname: Esquivel
authors.forename: Carlos L
authors.initials: CL
authors.lastname: Céspedes
mesh_terms: D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification; D039823:Iridoids / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D032263:Penstemon / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification; D059808:Polyphenols
chemical_list: D047309:Flavones; D005960:Glucosides; D039823:Iridoids; D010636:Phenols; C410405:martynoside; C523749:pensteminoside; C058956:acteoside; D059808:Polyphenols