17371
No significant differences in fatty acid concentrations of economy and standard chicken burgers were found , whereas economy chicken nuggets had higher C16 : 1 , C18 : 1 cis , C18 : 1 trans and C18 : 3 n - 3 concentrations than had standard ones .
 fatty acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 fatty acid