24799
Structural studies confirmed this N , N - dimethylamino tail moved towards the DFG motif to form a salt bridge with the side chain of Asp831 .
 Chemical: N , N - dimethylamino
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: N , N - dimethylamino