11428
Both CYP2B6 . 6 and CYP2B6 . 1 showed similar stereoselectivity ( S > R - methadone ) .
 Chemical: S > R - methadone
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: S > R - methadone 
Answer:
 Chemical: S > R - methadone