21916
Following i . v . 0 . 02 mg / kg and oral administration 0 . 04 , 0 . 12 or 0 . 36 mg / kg , the geometric mean Cmax values were 19 . 97 , 2 . 11 , 5 . 11 and 11 . 47 ng / ml , respectively ; the corresponding geometric mean AUC ( 0 - t ) values were 10 . 50 , 3 . 19 , 9 . 59 and 18 . 10 ng x h / ml , respectively .
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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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