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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
D03 Heterocyclic Compounds D006571 +
D03.549 Heterocyclic Compounds with 4 or More Rings D006576 +
D03.549.686 Morphinans D009019 +
D03.549.686.575 Morphine D009020 +
D03.549.686.575.547 Morphine Derivatives D009022 +
D03.549.686.575.547.204 Codeine D003061 +
D03.549.686.575.547.332 Heroin D003932
D03.549.686.575.547.420 Dihydromorphine D004090
D03.549.686.575.547.500 Hydromorphone D004091
D03.549.686.575.547.460 Ethylmorphine D005036
D03.549.686.575.547.851 Thebaine D013797
D03 Heterocyclic Compounds D006571 +
D03.605 Heterocyclic Compounds, Bridged-Ring D006572 +
D03.605.497 Morphinans D009019 +
D03.605.497.575 Morphine D009020 +
D03.605.497.575.547 Morphine Derivatives D009022 +
D03.605.497.575.547.204 Codeine D003061 +
D03.605.497.575.547.332 Heroin D003932
D03.605.497.575.547.420 Dihydromorphine D004090
D03.605.497.575.547.500 Hydromorphone D004091
D03.605.497.575.547.460 Ethylmorphine D005036
D03.605.497.575.547.851 Thebaine D013797