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US08470845B2 Analgesic and methods of treating pain 有权
止痛药和治疗疼痛的方法

Analgesic and methods of treating pain
摘要:
An analgesic which may be applied to wide variety of pain from various causes is disclosed. The analgesic comprises as an effective ingredient a specific morphinan derivative having a nitrogen containing heterocyclic group, such as compound 1:
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