3433
This improved method enables the reagent to be prepared reproducibly in one step from methyl bis ( 2 , 2 , 2 - trifluoroethoxy ) phosphonoacetate .
 Chemical: methyl bis ( 2 , 2 , 2 - trifluoroethoxy ) phosphonoacetate
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: methyl bis ( 2 , 2 , 2 - trifluoroethoxy ) phosphonoacetate