| Structure | Name/CAS No. | Articles | 
|---|---|---|
                        ![]()  | 
                    naltrexone
                     CAS:16590-41-3  | 
                    
                    |
                        ![]()  | 
                    oxycodone
                     CAS:76-42-6  | 
                    
                    |
                        ![]()  | 
                    Methylnaltrexone (Bromide)
                     CAS:73232-52-7  | 
                    
                    |
                        ![]()  | 
                    oxycodone hydrochloride
                     CAS:124-90-3  |