Using O=C1Nc2c(cc(-c3ccccc3)c3c2CNCC3)C1=O, COC(=O)CBr to produce COC(=O)CN1CCc2c(-c3ccccc3)cc3c(c2C1)NC(=O)C3=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.