22889
The Km values for UGT1A9 ( 15 . 6 +/- 1 . 6 mM for R - ornidazole ) and 2B7 ( 3 . 8 +/- 0 . 9 mM for S - ornidazole ) were quite similar to those determined in HLMs and HKMs ( 20 . 1 +/- 1 . 4 and 17 . 7 +/- 4 . 0 mM for R - ornidazole ; 6 . 6 +/- 1 . 3 and 3 . 2 +/- 0 . 4 mM for S - ornidazole ) .
 Chemical: R - ornidazole; Chemical: S - ornidazole; Chemical: R - ornidazole; Chemical: S - ornidazole
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: R - ornidazole; Chemical: S - ornidazole; Chemical: R - ornidazole; Chemical: S - ornidazole