Using COC(=O)COc1cccc(C(O)C(c2ccccc2)C2SCCCS2)c1 to produce O=C(O)COc1cccc(C(O)C(c2ccccc2)C2SCCCS2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.