Myocardial extractions of pyridaben, a mitochondrial complex I (MC-I) inhibitor, is well correlated with blood flow. Based on the synthesis and characterization of pyridaben analogue 2-tert-butyl-5-[2-(2-[18F] fluroethoxy) ethoxy] benzyloxy]-4-chloro-2H-pyridazin-3- one ([18F] FP2OP), this study assessed its potential to be developed as myocardial perfusion imaging (MPI) agent. Methods: The tosylate labeling precursor 2-(2-(4-(tert-butyl ...