Using O=S(=O)(Cl)CCCCl, CC(C)C[C@H](N)C(=O)OC(C)(C)C to produce CC(C)C[C@H](NS(=O)(=O)CCCCl)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.