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?? ???? >(1R,5R)-5-Isobutyl-6β-isopropyl-8-oxa-3-oxobicyclo[3.2.1]octane-2β-carboxylic acid methyl ester
(1R,5R)-5-Isobutyl-6β-isopropyl-8-oxa-3-oxobicyclo[3.2.1]octane-2β-carboxylic acid methyl ester
(1R,5R)-5-Isobutyl-6β-isopropyl-8-oxa-3-oxobicyclo[3.2.1]octane-2β-carboxylic acid methyl ester ??
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(1R,5R)-5-Isobutyl-6β-isopropyl-8-oxa-3-oxobicyclo[3.2.1]octane-2β-carboxylic acid methyl ester C??? ??, ??, ??
(1R,5R)-5-Isobutyl-6β-isopropyl-8-oxa-3-oxobicyclo[3.2.1]octane-2β-carboxylic acid methyl ester ?? ?? ? ???
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(1R,5R)-5-Isobutyl-6β-isopropyl-8-oxa-3-oxobicyclo[3.2.1]octane-2β-carboxylic acid methyl ester ?? ??
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