Using COC(=O)C(Cc1ccccc1)NC(=O)c1nc(-c2ccccc2)cs1 to produce O=C(NC(Cc1ccccc1)C(=O)O)c1nc(-c2ccccc2)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.