17780
Kinetic studies indicated that CYP 2C19 has the lowest Km , 0 . 516 mu M followed by 2B6 ( Km = 1 . 02 mu M ) and 3A4 ( Km = 18 . 9 mu M ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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