Using CCOC(=O)C1Oc2ccc(Cl)nc2C2Cc3c(F)cccc3N12 to produce CCOC(=O)C1Oc2ccc(Cl)nc2-c2cc3c(F)cccc3n21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.