18927
During the course of our study on the innovative ligand for nicotinic acetylcholinergic receptors , LNAChR , and in order to assess activity and toxicity profiles of the drug ' s metabolites , synthesis of the main metabolites was undertaken .
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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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