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?? ???? >2-Ethyl-2-methyl-3-oxo-4-[[(3R)-2-oxo-4β,5α-dimethyl-5β-hydroxytetrahydrofuran]-3α-yl]butyric acid methyl ester
2-Ethyl-2-methyl-3-oxo-4-[[(3R)-2-oxo-4β,5α-dimethyl-5β-hydroxytetrahydrofuran]-3α-yl]butyric acid methyl ester
2-Ethyl-2-methyl-3-oxo-4-[[(3R)-2-oxo-4β,5α-dimethyl-5β-hydroxytetrahydrofuran]-3α-yl]butyric acid methyl ester ??
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2-Ethyl-2-methyl-3-oxo-4-[[(3R)-2-oxo-4β,5α-dimethyl-5β-hydroxytetrahydrofuran]-3α-yl]butyric acid methyl ester C??? ??, ??, ??
2-Ethyl-2-methyl-3-oxo-4-[[(3R)-2-oxo-4β,5α-dimethyl-5β-hydroxytetrahydrofuran]-3α-yl]butyric acid methyl ester ?? ?? ? ???
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2-Ethyl-2-methyl-3-oxo-4-[[(3R)-2-oxo-4β,5α-dimethyl-5β-hydroxytetrahydrofuran]-3α-yl]butyric acid methyl ester ?? ??
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