| SCHRAM, Karl, Petra MIKETOVA, Jiří SLANINA, Otakar HUMPA a Eva TÁBORSKÁ. Mass spectrometry of 1,3- and 1,5-dicaffeoylquinic acids. Journal of Mass Spectrometry. John Wiley & Sons, Ltd., 2004, roč. 39, č. 4, s. 384-395. ISSN 1076-5174. |
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@article{555496,
author = {Schram, Karl and Miketova, Petra and Slanina, Jiří and Humpa, Otakar and Táborská, Eva},
article_number = {4},
keywords = {tandem mass spectrometry; natural products; dicaffeoylquinic acids; electrospray ionization},
language = {eng},
issn = {1076-5174},
journal = {Journal of Mass Spectrometry},
title = {Mass spectrometry of 1,3- and 1,5-dicaffeoylquinic acids},
url = {http://www3.interscience.wiley.com/cgi-bin/fulltext/107632630/PDFSTART},
volume = {39},
year = {2004}
}
TY - JOUR
ID - 555496
AU - Schram, Karl - Miketova, Petra - Slanina, Jiří - Humpa, Otakar - Táborská, Eva
PY - 2004
TI - Mass spectrometry of 1,3- and 1,5-dicaffeoylquinic acids
JF - Journal of Mass Spectrometry
VL - 39
IS - 4
SP - 384-395
EP - 384-395
PB - John Wiley & Sons, Ltd.
SN - 10765174
KW - tandem mass spectrometry
KW - natural products
KW - dicaffeoylquinic acids
KW - electrospray ionization
UR - http://www3.interscience.wiley.com/cgi-bin/fulltext/107632630/PDFSTART
N2 - Samples of 1,3- (1) and 1,5-dicaffeoylquinic acid (2) and their hexaacetate derivatives were examined using positive and negative electrospray ionization mass spectrometry and tandem mass spectrometry. Differences in the various spectra allow the discrimination of each of the isomers. Specific losses in the spectra of 2 also permit the identification of the site of substitution of one of the caffeic acid moieties as being at the 5-position. The spectra of 3,5- (3) and 4,5-dicaffeoylquinic (4) acids and their hexaacetate derivatives were compared with those of 1 and 2 and their derivatives, and differences in ion abundances or the presence/absence of specific ions can be used to identify uniquely each of the compounds.
ER -
SCHRAM, Karl, Petra MIKETOVA, Jiří SLANINA, Otakar HUMPA a Eva TÁBORSKÁ. Mass spectrometry of 1,3- and 1,5-dicaffeoylquinic acids. \textit{Journal of Mass Spectrometry}. John Wiley \&{} Sons, Ltd., 2004, roč.~39, č.~4, s.~384-395. ISSN~1076-5174.
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