Using CS(=O)(=O)Cl, Nc1ccc(OCCCN2C(=O)c3ccccc3C2=O)cc1 to produce CS(=O)(=O)Nc1ccc(OCCCN2C(=O)c3ccccc3C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.