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The main component of essential oil was ethyl homovanillate ( 11 . 79 % ) in buds and drimenol ( 29 . 42 % ) in roots .
 Chemical: ethyl homovanillate; Chemical: drimenol
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: ethyl homovanillate; Chemical: drimenol