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. 2022 May 27;15(6):676. doi: 10.3390/ph15060676

Figure 3.

Figure 3

HR MS and MS/MS spectra of MPI8 and MPI8•H2O using an extracted sample from MPI8 spiked plasma at retention time of 4.5 min after column elution on an X500B QTOF mass spectrometer; (A1,A2) and (B1,B2) in positive mode, (C1,C2) and (D1,D2) in negative mode; the proposed fragmentation of product ions are shown on MS/MS spectra: (A1) protonated MPI8 [MPI8 + H]+ MS (m/z 601.3594), (A2) protonated MPI8 [MPI8 + H]+ MS/MS; (B1) [MPI8•H2O + Na]+ MS (m/z 641.3502) (B2) [MPI8•H2O + Na]+ MS/MS; (C1) deprotonated MPI8 [MPI8 −H]− MS (m/z 599.3433), (C2) deprotonated MPI8 [MPI8 − H]− MS/MS; (D1) [MPI8•H2O + Cl]− MS (m/z 653.3325), (D2) [MPI8•H2O + Cl]− MS/MS.