Using CCOC(=O)c1cc2cc(C(=O)NCCNC(=O)OC(C)(C)C)ccc2[nH]1 to produce CC(C)(C)OC(=O)NCCNC(=O)c1ccc2[nH]c(C(=O)O)cc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.