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Relation: subclass

ControlledSubstance15ControlledSubstance is the subclass of BiologicallyActiveSubstances whose distribution and use ...^
    Narcotic3Narcotic is a subclass of addictive BiologicallyActiveSubstances that have damping effects on t...^
        Morphine.Morphine is a strong opiate that is found naturally in Opium, a dark brown resin produced by dryi...^
        Opium.A substance harvested from the seed capsules of the opium poppy that contains various powerful alka...^

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