3855
This is the first report of the isolation of the C1 - C6 oxygen bridge of furanoeremophilane .
 Chemical: C1 - C6; Chemical: oxygen; Chemical: furanoeremophilane
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: C1 - C6, oxygen, furanoeremophilane 
Answer:
 Chemical: C1 - C6; Chemical: oxygen; Chemical: furanoeremophilane