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2D 13C MR images of: (a) HP allyl 1-13C-pyruvate produced via pairwise addition of p-H2 to propargyl 1-13C-pyruvate in D2O, (b) HP ethyl 1-13C-acetate produced via pairwise addition of p-H2 to vinyl 1-13C-acetate in D2O, (c) 3 M solution of thermally polarized sodium 1-13C-acetate (signal reference phantom). The double image in display (a) is due to two HP species present with two distinctly different chemical shifts (see Figure 9 for more details).
