27914
To discover highly potent and selective inhibitors of P450s 1A1 , 1A2 , and 1B1 , as well as to investigate active site cavities of these enzymes , 14 novel flavone derivatives were prepared as chemical probes .
 Chemical: flavone
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: flavone