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|e rakwb
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|a eng
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|a Macías, Francisco A
|e verfasserin
|4 aut
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|a Characterization of the fraction components using 1D TOCSY and 1D ROESY experiments. Four new spirostane saponins from Agave brittoniana Trel. spp. Brachypus
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|c 2007
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 19.09.2007
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|a Date Revised 04.06.2007
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|a published: Print
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|a Citation Status MEDLINE
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|a Copyright (c) 2007 John Wiley & Sons, Ltd.
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|a A careful NMR analysis, especially 1D TOCSY and 1D ROESY, of two refined saponin fractions allowed us to determine the structures of four new saponins from a polar extract of the Agave brittoniana Trel. spp. Brachypus leaves. A full assignment of the 1H and 13C spectral data for these new saponins, agabrittonosides A-D (1-4), and one previously known saponin, karatavioside A (5) is reported. Their structures were established using a combination of 1D and 2D (1H, 1H-COSY, TOCSY, ROESY, g-HSQC, g-HMBC and g-HSQC-TOCSY) NMR techniques and ESI-MS. Moreover, the work represents a new approach to structural elucidation of saponins in refined fractions by NMR investigations
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Plant Extracts
|2 NLM
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|a Saponins
|2 NLM
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|a Spirostans
|2 NLM
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|a Guerra, José O
|e verfasserin
|4 aut
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|a Simonet, Ana M
|e verfasserin
|4 aut
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|a Nogueiras, Clara M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 45(2007), 7 vom: 01. Juli, Seite 615-20
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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|g volume:45
|g year:2007
|g number:7
|g day:01
|g month:07
|g pages:615-20
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