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A TRPA1 - specific antagonist , HC - 030031 , was shown to suppress skin sensitization in the presence of DBP .
 Chemical: HC - 030031; Chemical: DBP
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: HC - 030031; Chemical: DBP