No abstract available
MeSH terms
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Administration, Oral
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Analgesics*
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Animals
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Enkephalins / metabolism
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Enkephalins / pharmacology*
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Haplorhini
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In Vitro Techniques
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Injections
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Mice
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Morphine / pharmacology
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Naloxone / pharmacology
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Oligopeptides / pharmacology*
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Rats
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Receptors, Opioid / metabolism
Substances
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Analgesics
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Enkephalins
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Oligopeptides
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Receptors, Opioid
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Naloxone
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Morphine