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Reaction mixture of all-trans-retinal and glycerophosphoethanolamine. Incubation at room temperature for 3 days. Constituents of the synthetic mixture were separated by reversed-phase UPLC on a column (Waters XBridge C18; gradient B) with monitoring of UV-visible absorbance at 430 nm. Insets: selected ion monitoring at m/z 746 and UV-visible absorbance spectra corresponding to indicated chromatographic peak. Structure of A2-GPE, right.
