Using CCOC(=O)c1sc(-c2ccc(NC(=O)OC(C)(C)C)nc2)nc1C to produce Cc1nc(-c2ccc(NC(=O)OC(C)(C)C)nc2)sc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.