11418
Methadone N - demethylation by the common CYP2B6 allelic variant CYP2B6 . 6 .
 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