24479
The relationships between the substituents and the antimicrobial activities of the quinoxaline derivatives indicate that the electrophilicity of the halomethyl units plays an important role in generating the antimicrobial activity .
 Chemical: quinoxaline; Chemical: halomethyl
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: quinoxaline, halomethyl 
Answer:
 Chemical: quinoxaline; Chemical: halomethyl