Using O=C(NCc1cccc(Cl)c1)c1c(OCc2ccccc2)c(=O)c(Br)cn1CCO to produce O=C1c2c(OCc3ccccc3)c(=O)c(Br)cn2CCN1Cc1cccc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.