487
The essential oil was obtained by hydrodistillation , and gas chromatography / mass spectrometry analysis identified the main constituents : thymol ( 84 . 9 % ) and p - cymene ( 5 . 33 % ) .
 Chemical: thymol; Chemical: p - cymene
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: thymol; Chemical: p - cymene