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7-[[(6S)-6,7-Dimethyl-2-oxo-6-prop-2-enyl-3a,4,7,7a-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4-yl]oxy]-4-hydroxy-3-[(E)-N-methoxy-C-methylcarbonimidoyl]-8-methylchromen-2-one


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