8508
The aim of the present series of experiments was to improve the solubility and dissolution of two fixed dose combination formulations ( FDC ) , each consisting of two BCS class II drugs .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None