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