27364
Formulation F2 , which contained linseed mucilage ( 2 % ) and chitosan ( 0 . 5 % ) , showed the highest percentage of mucoadhesion , gel strength and sustained drug diffusion .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None