Using CCOC(CBr)OCC, COC(=O)Cc1n[nH]c(=O)c2ccccc12 to produce CCOC(Cn1nc(CC(=O)OC)c2ccccc2c1=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.