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. 2019 May 27;5(5):e01695. doi: 10.1016/j.heliyon.2019.e01695

Fig. 8.

Fig. 8

ESI -MS of act-D in positive ion mode: m/z 1277 corresponding to [M + Na]+ ion (top); MS/MS (middle) and MS3 (bottom) spectra by fragmentation experiment on m/z 1277.