14855
The surface containing a dimethylamine N - oxide headgroup and ethyl secondary amide linker showed the largest difference in adsorption of both proteins .
 Chemical: dimethylamine N - oxide; Chemical: ethyl secondary amide
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: dimethylamine N - oxide; Chemical: ethyl secondary amide