[S,(-)]-2-(Benzyloxycarbonyloxy)-3-methylbutyric acid
[S,(-)]-2-(Benzyloxycarbonyloxy)-3-methylbutyric acid ??
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[S,(-)]-2-(Benzyloxycarbonyloxy)-3-methylbutyric acid C??? ??, ??, ??
[S,(-)]-2-(Benzyloxycarbonyloxy)-3-methylbutyric acid ?? ?? ? ???
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[S,(-)]-2-(Benzyloxycarbonyloxy)-3-methylbutyric acid ?? ??
???( 0)?? ??