Using COC(=O)c1cscc1NC(=O)COc1ccc(-c2ncccn2)cc1 to produce O=C(COc1ccc(-c2ncccn2)cc1)Nc1cscc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.