21918
The terminal elimination half - lives ( t1 / 2 ) were 1 . 23 , 2 . 48 , 1 . 93 and 2 . 17h , respectively .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None