21507
This finding provides evidence for multiple oxygen - sensitive steps in the enzymatic conversion of nitroaryl compounds to the corresponding amino derivatives .
 Chemical: oxygen; Chemical: nitroaryl; Chemical: amino
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: oxygen, nitroaryl, amino 
Answer:
 Chemical: oxygen; Chemical: nitroaryl; Chemical: amino