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. 2014 Jan 2;11:1. doi: 10.1186/1743-7075-11-1

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Copyright © 2014 Pekkinen et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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The urinary metabolites from the cluster 2. A: 1. 3- or 4-HPPA sulfate, 2. 3- or 4-HPPA sulfate, 3. cinnamoylglycine, 4. 3 or 4-dihydroferulic acid sulfate, 5. 3- or 4-dihydroferulic acid sulfate, 6. aminophenolsulfate, 7. 3 or 4-caffeic acid sulfate, 8. m/z 258.99, 9. glucuronidated DHPPA, 10. tentative dihydrosinapic acid sulfate. B: 11. DHPPA sulfate and 12. hippuric acid (note the different scale).