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. 2021 Feb 26;11(3):140. doi: 10.3390/metabo11030140

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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HILIC-ESI-MS/MS spectra of representative neutral GSL species. Tandem mass spectrometry (MS/MS) spectra illustrate fragmentation pathways with specific product ions of (A) HexCer 18:1/16:0 at m/z 700.6, (B) Hex₂Cer 18:1/16:0 at m/z 862.6, (C) Gb₃ 18:1/16:0 at m/z 1024.7, and (D) Gb₄ 18:1/16:0 at m/z 1227.8.