Using CS(N)(=O)=O, CN1CCN(c2cccc(C3Nc4ccc(C(=O)O)cc4CC3(C)C)c2)C(=O)C1=O to produce CN1CCN(c2cccc(C3Nc4ccc(C(=O)NS(C)(=O)=O)cc4CC3(C)C)c2)C(=O)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.