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Total synthesis of 3,5-O-dicaffeoylquinic acid and its derivatives

✍ Scribed by K. Saki Raheem; Nigel P. Botting; Gary Williamson; Denis Barron

Book ID
113930212
Publisher
Elsevier Science
Year
2011
Tongue
French
Weight
222 KB
Volume
52
Category
Article
ISSN
0040-4039

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The mass spectral properties of 3,5-and 4,5-dicaffeoylquinic acids (DCQAs) and selected derivatives were examined using electron ionization (EI), fast atom bombardment (FAB) and electrospray ionization (ESI). EI analysis of the trimethylsilyl derivatives provides molecular mass (M r ) information, b

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## Abstract 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 is