100676
GTS-21 ( DMXB-A ) is a drug that acts as a partial agonist at neural nicotinic acetylcholine receptor s. It binds to both the α4β2 and α7 subtypes , but activates only the α7 to any significant extent .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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