23083
It has been found that use of 2 , 2 , 3 , 3 - tetrafluoro - 1 , 4 - butanediol as a fluorinated extender of prepolymer chains is essential to obtain coatings with increased hydrophobicity , applied among others as biomaterials - next to diphenylmethane diisocyanate and polyoxyethylene glycol .
 Chemical: 2 , 2 , 3 , 3 - tetrafluoro - 1 , 4 - butanediol; Chemical: diphenylmethane diisocyanate; Chemical: polyoxyethylene 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: 2 , 2 , 3 , 3 - tetrafluoro - 1 , 4 - butanediol; Chemical: diphenylmethane diisocyanate; Chemical: polyoxyethylene glycol