22079
NMR studies revealed that the ketoprofen molecules were entrapped in a vesicle bilayer in all vesicular formulations , and that the ketoprofen molecules affected the phosphate mobility in the liposomal formulations .
 ketoprofen, ketoprofen, phosphate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ketoprofen, ketoprofen, phosphate