Figure 2
From: New insights into quetiapine metabolism using molecular networking

Isomer differentiation using. Chromatogram analysis of m/z 400.168 isomers (RT 4.9 and RT 5.6) at H24 and analysis of MS2 spectra allowed isomer differentiation. (a) Blue box: 7-hydroxyquetiapine MS2 spectra shows the oxidized cycle structure without sulfur fragment (m/z 237.10). (b) Red box: quetiapine sulfoxide MS2 spectra shows the unoxidized cycle without sulfur fragment (m/z 221.11).