Using NC(=O)c1ccccc1Nc1nc(-c2cccnc2)nc2ccc(O)cc12, ClCCBr to produce NC(=O)c1ccccc1Nc1nc(-c2cccnc2)nc2ccc(OCCCl)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.