1391
Quantitative prediction of CYP2B6 induction by estradiol during pregnancy : potential explanation for increased methadone clearance during pregnancy .
 Chemical: estradiol; Chemical: methadone
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: estradiol; Chemical: methadone