2391
Halothane is metabolized by an oxidative pathway to stable , nonvolatile end products , trifluoroacetic acid ( TFAA ) and bromide ( Br - ) , and by reductive pathways to Br - and inorganic fluoride ( F - ) .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None