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 ]
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: benzyl; Chemical: 3 - [ ( methylamino ) acyl ]