26549
Development and validation of ethylenethiourea determination in foods using methanol - based extraction , solid - phase extraction cleanup and LC - MS / MS .
 ethylenethiourea, methanol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ethylenethiourea, methanol