Entry score ------------------------------------------------------------------------------- --------- C06863 Butorphanol 1.0000 D05299 Oxilorphan 0.8966 C07251 Nalbuphine 0.8850 D00843 Nalbuphine hydrochloride 0.8850 D08246 Nalbuphine 0.8850 C07069 Levallorphan 0.8246