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4,5,6,7,8,8a-hexahydro-2H-cyclohepta[d]furan-3-carboxylic acid methyl ester methyl 4,5,6,7,8,8a-hexahydro-2H-cyclohepta[d]furan-3-carboxylate methyl 4,5,6,7,8,8a-hexahydro-2H-cyclohepta[b]furan-3-carboxylat méthyle4,5,6,7,8,8a-hexahydro-2H-cyclohepta[b]furan-3-carboxylate メチル=4,5,6,7,8,8a-ヘキサヒドロ-2H-シクロヘプタ[b]フラン-3-カルボキ
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