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Botulinum neurotoxin ( BoNT ) is an acetylcholine release inhibitor and a neuromuscular - blocking agent used for the treatment of a variety of medical and cosmetic indications .
 acetylcholine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 acetylcholine