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Positive-mode 213 nm UVPD spectra of ether glycerophospholipid standards (a) PC(O-16:0/18:1(9Z)), (b) PE(O-16:0/18:1(9Z)), (c) PC(P-18:0/18:1(9Z)), and (d) PE(P-18:0/18:1(9Z)) with corresponding fragment maps (e-h). The mass accuracy values of the assigned fragment ions are shown in Table S4.
