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. Author manuscript; available in PMC: 2016 Apr 1.
Published in final edited form as: Metabolomics. 2014 Jul 31;11(2):391–402. doi: 10.1007/s11306-014-0704-4

Figure 4.

Figure 4

Direct injection static-nESI-MS/MS CID spectrum of m/z 203. Fragment ions at m/z 123, 141, and 159 are consistent with a polyhydroxy carboxylic acid, such as 2-deox-gluconate or fuconate (inset). A complete assignment of all peaks to the putative structure(s) was not possible, most likely due to selection of multiple multiple isobaric and / or isomeric species prior to dissociation.