3-Methyl-4-oxo-4-(2-furanyl)butanoic acid
3-Methyl-4-oxo-4-(2-furanyl)butanoic acid ??
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3-Methyl-4-oxo-4-(2-furanyl)butanoic acid ?? ?? ? ???
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3-Methyl-4-oxo-4-(2-furanyl)butanoic acid ?? ??
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