Using CCOC(=O)CBr, CCOC(=O)c1ccc2cc(C(C(=O)OC)C(=O)OC)ccn2c1=O to produce CCOC(=O)CC(C(=O)OC)(C(=O)OC)c1ccn2c(=O)c(C(=O)OCC)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.