Using CON(C)C(=O)c1sc(NC(C)=O)nc1CCc1ccc(NC(=O)OC(C)(C)C)cc1 to produce CC(=O)Nc1nc(CCc2ccc(NC(=O)OC(C)(C)C)cc2)c(C=O)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.