Using O=C(CCCCC1CCSS1)OCc1ccc2ccc3cccc4ccc1c2c34 to produce O=C(CCCCC(S)CCS)OCc1ccc2ccc3cccc4ccc1c2c34, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.