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In the present study , the potential of doash tea to influence carcinogen metabolism was investigated indirectly using heterocyclic amines as model mutagens , IQ and PhIP .
 Chemical: heterocyclic amines; Chemical: PhIP
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: heterocyclic amines; Chemical: PhIP