17774
Metabolism of profenofos to 4 - bromo - 2 - chlorophenol , a specific and sensitive exposure biomarker .
 Chemical: profenofos; Chemical: 4 - bromo - 2 - chlorophenol
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: profenofos; Chemical: 4 - bromo - 2 - chlorophenol