8193
Synthesis and structure - activity relationship of piperidine - derived non - urea soluble epoxide hydrolase inhibitors .
 Chemical: piperidine; Chemical: urea; Chemical: epoxide
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: piperidine; Chemical: urea; Chemical: epoxide