21570
DH beta E antagonized nicotine in animals discriminating the smallest dose of nicotine .
 Chemical: DH beta E; Chemical: nicotine; Chemical: nicotine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: DH beta E; Chemical: nicotine; Chemical: nicotine