7306
Hence , the physicochemical characterization , combined with ex vivo studies , revealed that the PPG - 5 - CETETH - 20 , oleic acid , and water formulation could form a mucoadhesive matrix in contact with nasal mucus that promoted nasal absorption of the AZT .
 Chemical: PPG - 5 - CETETH - 20; Chemical: oleic acid; Chemical: AZT
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: PPG - 5 - CETETH - 20, oleic acid, AZT 
Answer:
 Chemical: PPG - 5 - CETETH - 20; Chemical: oleic acid; Chemical: AZT