7298
The purpose of this study was to develop a mucoadhesive stimuli - sensitive drug delivery system for nasal administration of zidovudine ( AZT ) .
 Chemical: zidovudine; 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: zidovudine, AZT 
Answer:
 Chemical: zidovudine; Chemical: AZT