22766
We investigated salt interactions with butyramide as a simple mimic of cation interactions with protein backbones .
 Chemical: butyramide
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: butyramide 
Answer:
 Chemical: butyramide