Using CC(=O)SCC(Cc1ccccc1)C(=O)Nc1cccc(C(=O)OCc2ccccc2)c1 to produce O=C(OCc1ccccc1)c1cccc(NC(=O)C(CS)Cc2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.