Using CCOC(=O)c1cnc2c(O)c(F)c(F)cc2c1O, ClCc1ccccc1 to produce CCOC(=O)c1cnc2c(OCc3ccccc3)c(F)c(F)cc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.