Using CCOC(=O)C(C)(C(=O)OCC)C(CC)C(=O)c1ccc2nc(-c3ccccc3)oc2c1 to produce CCC(C(=O)c1ccc2nc(-c3ccccc3)oc2c1)C(C)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.