Using O=C(O)c1ccc(Br)cc1, COC(=O)c1ccc(OCCN)cc1 to produce COC(=O)c1ccc(OCCNC(=O)c2ccc(Br)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.