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4,4,7a-trimethylhexahydro-1-benzofuran-2(3H)-one 4,4,7a-trimethyl-3a,5,6,7-tetrahydro-3H-1-benzofuran-2-one 4,4,7a-trimethyl-3a,5,6,7-tetrahydro-3H-1-benzofuran-2-on 4,4,7a-triméthyl-3a,5,6,7-tetrahydro-3H-1-benzofuran-2-one 4,4,7a-トリメチル-3a,5,6,7-テトラヒドロ-3H-1-ベンゾフラン-2-オン
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