17570
The prodrug systems introduced here involve forming a nitro - substituted acylsulfonamide group in the case of celecoxib and a nitro - substituted 21 - ester for the glucocorticoids .
 Chemical: nitro - substituted acylsulfonamide; Chemical: celecoxib; Chemical: nitro - substituted 21 - ester
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: nitro - substituted acylsulfonamide, celecoxib, nitro - substituted 21 - ester 
Answer:
 Chemical: nitro - substituted acylsulfonamide; Chemical: celecoxib; Chemical: nitro - substituted 21 - ester