22277
( Euphorbiaceae ) stem bark essential oil as possible mutagen - protective food ingredient against heterocyclic amines from cooked food .
 Chemical: heterocyclic amines
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: heterocyclic amines