Using COC(=O)c1ccccc1COc1ccc(CCNS(=O)(=O)Cc2ccccc2)cc1 to produce O=C(O)c1ccccc1COc1ccc(CCNS(=O)(=O)Cc2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.