4540
The patent claims 2 - amino - 4 - arylthiazole derivative compounds as inhibitors of the TRPA1 ( transient receptor potential ankyrin , member 1 ) receptor .
 Chemical: 2 - amino - 4 - arylthiazole
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: 2 - amino - 4 - arylthiazole