5350
The name originally referred to its high affinity and great potency in the bioassay that was used to follow its activity during purification , but the name has come to have a second meaning : studies of its physiologic function in brain continue to provide powerful insights to the molecular mechanisms controlling mood disorders and drug addiction .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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