17073
N1 meta - substituted benzyl groups possessing an alpha - amino - 3 - [ ( methylamino ) acyl ] - group were the most potent N1 - substituents .
 Chemical: benzyl; Chemical: 3 - [ ( methylamino ) acyl ]
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: benzyl, 3 - [ ( methylamino ) acyl ] 
Answer:
 Chemical: benzyl; Chemical: 3 - [ ( methylamino ) acyl ]