27366
The bioavailability of venlafaxine in the formulation F2 was 63 . 08 +/- 1 . 28 % by buccal route , which was higher than by the oral route ( 39 . 21 +/- 6 . 18 % ) .
 venlafaxine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 venlafaxine