Using CCOC(=O)c1c(OC)c2n(c1Br)[C@@H](C)CN(CC)C2=O, COC(=O)C(=O)OC to produce CCOC(=O)c1c(OC)c2n(c1C(=O)C(=O)OC)[C@@H](C)CN(CC)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.