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An interesting finding was that butylated hydroxytoluene was detected as a natural antioxidant in this work , which was usually taken as a synthesized antioxidant .
 Chemical: butylated hydroxytoluene
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: butylated hydroxytoluene