24720
Microsomal intrinsic clearances were not significantly different , suggesting the in vivo clearances of R - and S - lorazepam are likely to be similar .
 Chemical: R - and S - lorazepam
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 - and S - lorazepam