Using COC(=O)c1ccc(C(=O)O)cc1Br, O=C1CCC(=O)N1O to produce COC(=O)c1ccc(C(=O)ON2C(=O)CCC2=O)cc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.