26053
Potent Inhibitors of Phosphatidylinositol 3 ( PI3 ) Kinase that have Antiproliferative Activity Only When Delivered as Prodrug Forms .
 Phosphatidylinositol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Phosphatidylinositol