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Structures of two products generated from a reaction at 37 °C and pH 7.4 between dR5P and β-Ala. A. Four-min retention-time compound, an amine derivative of 5-MP, with an absorbance maximum at 260 nm. B. Six-min retention-time compound, N-methyl-2-formylpyrrole, with an absorbance maximum at 290 nm.
