Using COC(=O)C(C)(C)N1C(=O)C2(C)COCCN2c2nc(Cl)ncc21 to produce CC(C)(C(=O)O)N1C(=O)C2(C)COCCN2c2nc(Cl)ncc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.