Ethyl 2-methyl-4,4,4-trifluoroacetoacetateEthyl 2-methyl-3-oxo-4,4,4-trifluorobutanoateEthyl 2-methyl-4,4,4-trifluoroacetoacetateEthyl 4,4,4-trifluoro-2-methyl-3-oxobutanoate2-甲基-4,4,4-三氟乙酰乙酸乙酯2-Methyl-4,4,4-trifluoroacetoacetic acid ethyl esterEthyl 2-methyl-3-oxo-4,4,4-trifluorobutyrate