30341
At the extremes of the new compounds were 2 - amino - 3 - ( 4 - methylpiperazin - 1 - yl ) quinoxaline , which showed 11 - fold selectivity for the 5 - HT3 A receptor , and 2 - ( 4 - methylpiperazin - 1 - yl ) quinoxaline , which showed an 8 . 3 - fold selectivity for the 5 - HT3 AB receptor .
 Chemical: 2 - amino - 3 - ( 4 - methylpiperazin - 1 - yl ) quinoxaline; Chemical: 2 - ( 4 - methylpiperazin - 1 - yl ) quinoxaline
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: 2 - amino - 3 - ( 4 - methylpiperazin - 1 - yl ) quinoxaline, 2 - ( 4 - methylpiperazin - 1 - yl ) quinoxaline 
Answer:
 Chemical: 2 - amino - 3 - ( 4 - methylpiperazin - 1 - yl ) quinoxaline; Chemical: 2 - ( 4 - methylpiperazin - 1 - yl ) quinoxaline