[R,(+)]-2-Acetyloxy-3-methylbutyric acid
[R,(+)]-2-Acetyloxy-3-methylbutyric acid ??
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[R,(+)]-2-Acetyloxy-3-methylbutyric acid C??? ??, ??, ??
[R,(+)]-2-Acetyloxy-3-methylbutyric acid ?? ?? ? ???
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[R,(+)]-2-Acetyloxy-3-methylbutyric acid ?? ??
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