Pensteminoside, an unusual catalpol-type iridoid from Penstemon gentianoides HBK (Plantaginaceae) |
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| Authors: | Domínguez Mariana Marín J Camilo Esquivel Baldomero Céspedes Carlos L |
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| Institution: | 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. |
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| 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. |
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