2-(Trifluoromethyl)-4-oxobutanoic acid ethyl ester
2-(Trifluoromethyl)-4-oxobutanoic acid ethyl ester ??
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2-(Trifluoromethyl)-4-oxobutanoic acid ethyl ester C??? ??, ??, ??
2-(Trifluoromethyl)-4-oxobutanoic acid ethyl ester ?? ?? ? ???
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2-(Trifluoromethyl)-4-oxobutanoic acid ethyl ester ?? ??
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