4407
SDE method preferred to the analysis of compounds with low volatility including fatty acids and esters .
 Chemical: fatty acids; Chemical: esters
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: fatty acids, esters 
Answer:
 Chemical: fatty acids; Chemical: esters