11429
Human liver microsomes with diminished CYP2B6 content due to a CYP2B6 * 6 allele had lower rates of methadone N - demethylation .
 Chemical: methadone; Chemical: N
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: methadone; Chemical: N