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. 2018 Dec 14;8:17874. doi: 10.1038/s41598-018-36291-6

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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UHPLC-MS/MS profile of capsule-brewed coffees with detection of the considered compounds by SRM. Legend: m/z 95 for N-methylpyridinium (1); m/z 138 for trigonelline (2); m/z 124 for niacin (3); m/z 195 for caffeine (4); m/z 353 for caffeoylquinic acids (5–7); m/z 367 for feruloylquinic acids (8–10); m/z 337 for coumaroylquinic acids (11–12); m/z 335 for caffeoylshikimic acids and caffeoylquinic lactones (13–16); m/z 349 for feruloylquinic lactones (17). See Table 1 for further details.