(5S)-6α-[2-(1,3-Benzodioxol-5-yl)ethyl]-5,6-dihydro-4,5β-dimethoxy-2H-pyran-2-one;(5S,6S)-6-[2-(1,3-Benzodioxol-5-yl)ethyl]-5,6-dihydro-4,5-dimethoxy-2H-pyran-2-one
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