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