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3 . The oxidase activity affording 5 - OH - BP - 3 was enhanced in liver microsomes of dexamethasone - , phenobarbital - and 3 - methylcholanthrene - treated rats .
 Chemical: 5 - OH - BP - 3; Chemical: dexamethasone; Chemical: phenobarbital; Chemical: 3 - methylcholanthrene
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: 5 - OH - BP - 3; Chemical: dexamethasone; Chemical: phenobarbital; Chemical: 3 - methylcholanthrene