4407
The presence of verapamil and Pluronic both improved the intestinal absorption of PTX , which further certified the effect of Pluronic on P - gp inhibition .
 Chemical: verapamil; Chemical: Pluronic; Chemical: PTX; Chemical: Pluronic
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: verapamil; Chemical: Pluronic; Chemical: PTX; Chemical: Pluronic