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Fragmentation of parent ions that were tentatively assigned as antimycins showing fragmentation of (a) parent ion m/z m/z 521.24854 (Antimycin A3 or A7, C26H36N2O9) and (b) parent ion m/z 493.21734 (Antimycin A5, C24H32N2O9). MS2 spectra (i) and MS3 (ii) are annotated to illustrate the predicted fragmentation patterns of parent antimycins.
