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The optimum formulation of SMEDDS was a system consisting of ethyl oleate , tween 80 , and propylene glycol with a mean droplet size of 39 . 42 nm .
 Chemical: ethyl oleate; Chemical: tween 80; Chemical: propylene glycol
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: ethyl oleate; Chemical: tween 80; Chemical: propylene glycol