Using O=C(Nc1ccccc1)C(C(C(=O)O)C1CCCCC1)=S(=O)=O to produce O=C1C(=S(=O)=O)C(C2CCCCC2)C(=O)N1c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.