(2R,3S)-2-Ethyl-3-hydroxybutyric acid 2,2-dimethylpropyl ester
(2R,3S)-2-Ethyl-3-hydroxybutyric acid 2,2-dimethylpropyl ester ??
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(2R,3S)-2-Ethyl-3-hydroxybutyric acid 2,2-dimethylpropyl ester C??? ??, ??, ??
(2R,3S)-2-Ethyl-3-hydroxybutyric acid 2,2-dimethylpropyl ester ?? ?? ? ???
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(2R,3S)-2-Ethyl-3-hydroxybutyric acid 2,2-dimethylpropyl ester ?? ??
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