Fallypride [benzamide, 5-(3-fluoropropyl)-2, 3-dimethoxy-N-[(2S)-1-(2-propenyl)-2- pyrrolidinyl] methyl]-, CAS RN 166173-78-0] is a selective dopamine D2/D3 receptor antagonist. Carbon-11 labeled fallypride may serve as a radiotracer for use in biomedical imaging technique positron emission tomography (PET). The precursor, 5-(3-fluoropropyl)-2- hydroxy-3-methoxy-N-[(2S)-1-(2-propenyl)-2-pyrrolidinyl] methyl] benzamide was ...