2870
In the present study , 8 - hydroxycalamenene was isolated from the hexane fraction of Reynoutria elliptica .
 Chemical: 8 - hydroxycalamenene; Chemical: hexane
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 8 - hydroxycalamenene, hexane 
Answer:
 Chemical: 8 - hydroxycalamenene; Chemical: hexane