Using COC(=O)c1cccc(Sc2cnc(NC(=O)OC(C)(C)C)s2)c1 to produce CC(C)(C)OC(=O)Nc1ncc(Sc2cccc(C(=O)O)c2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.