Using COc1ccc(Cc2ccc(NC(=O)C3CSc4ccccc4C3=O)cc2)cc1OC to produce O=C(Nc1ccc(Cc2ccc(O)c(O)c2)cc1)C1CSc2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.