6465
The activity affording 2 , 4 - diOH - BP was enhanced in liver microsomes of 3 - methylcholanthrene - and phenobarbital - treated rats .
 Chemical: 2 , 4 - diOH - BP; Chemical: 3 - methylcholanthrene; Chemical: phenobarbital
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 , 4 - diOH - BP; Chemical: 3 - methylcholanthrene; Chemical: phenobarbital