ethyl (2Z)-4,4,4-trifluoro-3-oxo-2-(2-phenylhydrazinylidene)butanoate
2-methyl-5-trifluoromethyl-2H-pyrazol-3-ol
ethyl 4,4,4-trifluoro-2-(hydroxyimino)-3-oxobutanoate
1-phenyl-3-trifluoromethyl-5-hydroxypyrazole
ethyl 2-chloro-4,4,4-trifluoro-3-oxobutanoate