22070
PURPOSE : To determine the effect of elasticity on the skin permeation of ketoprofen from surfactant - based vesicular formulations and elastic liposomes .
 Chemical: ketoprofen
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: ketoprofen 
Answer:
 Chemical: ketoprofen