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Panel A: Compound A1 (1,5-diphenyl-2,4-pentadien-1-one) in site A. Panel B: Compound A4∶3,6-di(2 pyridyl) pyridazine in site A. Panel C: Compound B1 (1-benzofuran-2-yl-phenylmethanone in site B. Panel D: Compound B2 (1-methyl-4-[(4-methylphenyl)-NNO-azoxy]benzene) in site B.
