Using O=C(CCl)N(c1ccccc1)C1CCCCC1, Fc1ccc(S)cc1 to produce O=C(CSc1ccc(F)cc1)N(c1ccccc1)C1CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.