21946
This work studied the buccal absorption of metoprolol in vitro , ex vivo and in vivo as a function of buffered pH at 7 . 4 , 8 . 5 , 9 . 0 and 9 . 5 .
 Chemical: metoprolol
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: metoprolol