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Expedient synthesis of gram-scale A2E. (A) Three grams (3 g) of A2E isolated as an amorphous solid by liquid partitioning. Scale provided by ruler graded in inches. (B) Representative HPLC chromatogram of A2E. Labeled peaks (1–7) and corresponding absorption spectra are shown. Percentages are percent areas. Peaks below 2 minutes are from the solvent front. AU, absorption units. (C) Representative UV-Vis spectrum of A2E purified by liquid partitioning.
