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- Title
Iridoids from the stems of Viburnum erosum.
- Authors
In, Seo-Ji; Seo, Kyeong-Hwa; Song, Na-Young; Song, Myoung-Chong; An, Eun-Mi; Baek, Nam-In
- Abstract
Two new iridoids were isolated and identified to three known ones, namely, loganic acid ( 2), sweroside ( 3), and 7- O-tigloylsecologanol ( 4), from the stems of Viburnum erosum. Dried stems of V. erosum were extracted with 80% methanol (MeOH), and the concentrated extract was partitioned successively with ethyl acetate (EtOAc), n-butyl alcohol ( n-BuOH), and H2O. Five compounds were isolated after repeated silica gel (SiO2), octadecyl SiO2 (ODS), and Sephadex LH-20 column chromatography of the EtOAc fraction. The chemical structures of the compounds were determined based on spectroscopic data from 1H- and 13C-NMR, DEPT, and 2D-NMR (gCOSY, gHSQC, gHMBC) data. The new iridoids were identified as 3,7-dihydroxy-8-methyl-cyclopenta[ c]pyran-4-carboxylic acid ( 1) and rel-(1 S,5 R,9 S)-9-ethenyl-1-( β-D-glucopyrinosyloxy)-5,9-dihydro-5-{2-[(2-methylbut-2-enoyl)oxy]ethyl}-1 H-pyran-4-carboxylic acid ( 5) and named viburnin and epi-7- O-tigloylsecologanolic acid, respectively. This is the first report of the isolation of these five iridoids from V. erosum.
- Subjects
IRIDOIDS; PLANT stems; VIBURNUM; ETHYL acetate; METHANOL
- Publication
Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2014, Vol 68, Issue 7, p761
- ISSN
0018-3830
- Publication type
Article
- DOI
10.1515/hf-2013-0227