Using O=C1N(c2ccccc2)c2ccccc2C1(CCCCCl)Cc1ccncc1, CCCS to produce CCCSCCCCC1(Cc2ccncc2)C(=O)N(c2ccccc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.