Using O=C1CCC(=O)N1Br, Cc1ccc2ccnc(N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)c2c1 to produce CC(C)(C)OC(=O)N(C(=O)OC(C)(C)C)c1nccc2ccc(CBr)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.