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. 2022 Feb 15;94(8):3543–3552. doi: 10.1021/acs.analchem.1c04530

Figure 4.

Figure 4

Measured spectrum of the [M – H] ion of oleic acid in the mycelium extract samples of F. graminearum using the standard tracer approach. X denotes the predominant, monoisotopic, native deprotonated molecule. Also shown in red boxes are the isotopologs defined in the rules that must be present and their permitted intensity ranges.