Using O=C1OC(=O)c2ccc(Br)c3cccc1c23, CC(C)c1cccc(C(C)C)c1N to produce CC(C)c1cccc(C(C)C)c1N1C(=O)c2cccc3c(Br)ccc(c23)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.