23763
Biotransformation of 2 , 2 ' , 4 , 4 ' - Tetrabromodiphenyl Ether ( BDE - 47 ) by Human Liver Microsomes : Identification of Cytochrome P450 2B6 as the Major Enzyme Involved .
 Chemical: 2 , 2 ' , 4 , 4 ' - Tetrabromodiphenyl Ether; Chemical: BDE - 47
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: 2 , 2 ' , 4 , 4 ' - Tetrabromodiphenyl Ether; Chemical: BDE - 47