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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1002/mrc.2487
|2 doi
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|a pubmed24n0634.xml
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|a (DE-627)NLM190284293
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|a (NLM)19637246
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Hernández-Carlos, Beatriz
|e verfasserin
|4 aut
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|a New saponins from Sechium mexicanum
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 04.01.2010
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|a Date Revised 12.10.2009
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|a published: Print
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|a Citation Status MEDLINE
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|a 2009 John Wiley & Sons, Ltd.
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|a The chemical study of Sechium mexicanum roots led to the isolation of the two new saponins {3-O-beta-D-glucopyranosyl (1 --> 3)-beta-D-glucopyranosyl-2beta,3beta,16alpha,23-tetrahydroxyolean-12-en-28-oic acid 28-O-alpha-L-rhamnopyranosyl-(1 --> 3)-beta-D-xylopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl-(1 --> 2)-alpha-L-arabinopyranoside} (1) and {3-O-beta-D-glucopyranosyl (1 --> 3)-beta-D-glucopyranosyl-2beta,3beta,16alpha,23-tetrahydroxyolean-12-en-28-oic acid 28-O-alpha-L-rhamnopyranosyl-(1 --> 3)-beta-D-xylopyranosyl-(1 --> 4)-[beta-D-apiosyl-(1 --> 3)]-alpha-L-rhamnopyranosyl-(1 --> 2)-alpha-L-arabinopyranoside} (2), together with the known compounds {3-O-beta-D-glucopyranosyl-(1 --> 3)-beta-D-glucopyranosyl-2beta,3beta,6beta,16alpha,23-pentahydroxyolean-12-en-28-oic acid 28-O-alpha-L-rhamnopyranosyl-(1 --> 3)-beta-D-xylopyranosyl-(1 --> 4)-alpha-L-rhamnopyranosyl-(1 --> 2)-alpha-L-arabinopyranoside} (3), tacacosides A(1) (4) and B(3) (5). The structures of saponins 1 and 2 were elucidated using a combination of (1)H and (13)C 1D-NMR, COSY, TOCSY, gHMBC and gHSQC 2D-NMR, and FABMS of the natural compounds and their peracetylated derivates, as well as by chemical degradation. Compounds 1-3 are the first examples of saponins containing polygalacic and 16-hydroxyprotobasic acids found in the genus Sechium, while 4 and 5, which had been characterized partially by NMR, are now characterized in detail
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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 Carmona-Pineda, Miriam
|e verfasserin
|4 aut
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|a Villanueva-Cañongo, Claudia
|e verfasserin
|4 aut
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|a López-Olguín, Jesús F
|e verfasserin
|4 aut
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|a Aragón-García, Agustín
|e verfasserin
|4 aut
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|a Joseph-Nathan, Pedro
|e verfasserin
|4 aut
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 47(2009), 11 vom: 01. Nov., Seite 994-1003
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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|g volume:47
|g year:2009
|g number:11
|g day:01
|g month:11
|g pages:994-1003
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|u http://dx.doi.org/10.1002/mrc.2487
|3 Volltext
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