Fig. 3.

Thermal spectrum corresponding to the hyperpolarized data presented in Fig. 2. (A) After addition of Magnevist Gd-chelate to a final concentration of 5 mM, the only peaks observed correspond to [1-¹³C]-AcOH and the previously observed acetylated amino acid products (outlined). (B) Expanded region of interest in the ¹³C spectrum.