3431
Improved preparation of methyl bis ( 2 , 2 , 2 - trifluoroethoxy ) - bromophosphonoacetate for the stereoselective synthesis of ( E ) - alpha - bromoacrylates .
 Chemical: methyl bis ( 2 , 2 , 2 - trifluoroethoxy ) - bromophosphonoacetate; Chemical: ( E ) - alpha - bromoacrylates
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: methyl bis ( 2 , 2 , 2 - trifluoroethoxy ) - bromophosphonoacetate, ( E ) - alpha - bromoacrylates 
Answer:
 Chemical: methyl bis ( 2 , 2 , 2 - trifluoroethoxy ) - bromophosphonoacetate; Chemical: ( E ) - alpha - bromoacrylates