(4S)-5β-Ethenyl-4,5-dihydro-4α-methylfuran-2(3H)-one
(4S)-5β-Ethenyl-4,5-dihydro-4α-methylfuran-2(3H)-one ??
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(4S)-5β-Ethenyl-4,5-dihydro-4α-methylfuran-2(3H)-one ?? ?? ? ???
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(4S)-5β-Ethenyl-4,5-dihydro-4α-methylfuran-2(3H)-one ?? ??
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