7708
In particular , substitution of the C - terminal Asp for alanine and branched alkyl side chains ( Val , Leu , Ile ) for linear ones ( Nle , Nva ) rendered the greatest improvements in activity .
 Chemical: C; Chemical: Asp; Chemical: alanine; Chemical: alkyl; Chemical: Val; Chemical: Leu; Chemical: Ile; Chemical: Nle; Chemical: Nva
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: C; Chemical: Asp; Chemical: alanine; Chemical: alkyl; Chemical: Val; Chemical: Leu; Chemical: Ile; Chemical: Nle; Chemical: Nva