2848
Metabolism occurs primarily via oxidative N - demethylation to form M4 and oxidation reactions to form elzasonan N - oxide ( M5 ) and 5 - hydroxyelzasonan metabolite ( M3 ) .
 N, elzasonan N - oxide, 5 - hydroxyelzasonan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 N, elzasonan N - oxide, 5 - hydroxyelzasonan