Using CCOC(=O)C(CC(=O)c1ccc(Oc2ccccc2)cc1)SC(C)=O to produce CCOC(=O)C(S)CC(=O)c1ccc(Oc2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.