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Synthesis of Precursor 2 and [11C]1. Reagents and conditions: (i) BBr3 (1.0 mol/L in dichloromethane), dichloromethane, −78°C to room temperature, overnight; (ii) 2 (precursor, 0.5 mg), [11C]CH3I, NaOH (1 M. 10 μL), in 0.3 mL DMF, 3 min, 80°C. Radiochemical yield (RCY): 20–25% (non-decay corrected to trapped [11C]CH3I).
