All
 D03 Heterocyclic Compounds D006571 +
 D03.132 Alkaloids D000470 +
 D03.132.610 Opium D009892 +
 D03.132.610.422 Morphinans D009019 +
 D03.132.610.422.547 Morphine D009020 +
 D03.132.610.422.547.547 Morphine Derivatives D009022 +
 D03.132.610.422.547.547.149 Codeine D003061 +
 D03.132.610.422.547.547.267 Heroin D003932 
 D03.132.610.422.547.547.350 Dihydromorphine D004090 
 D03.132.610.422.547.547.450 Hydromorphone D004091 
 D03.132.610.422.547.547.430 Ethylmorphine D005036 
 D03.132.610.422.547.547.692 Oxymorphone D010111 
 D03.132.610.422.547.547.856 Thebaine D013797