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4-(2,2-dimethyl-hydrazinyl)-6-pentyl-5,6-dihydro-pyran-2-one 6-amyl-4-(N',N'-dimethylhydrazino)-5,6-dihydropyran-2-one 4-(2,2-dimethylhydrazinyl)-6-pentyl-5,6-dihydropyran-2-one 4-(2,2-dimethylhydrazinyl)-2-pentyl-2,3-dihydropyran-6-on 4-(2,2-diméthylhydrazinyl)-2-pentyl-2,3-dihydropyran-6-one 4-(2,2-ジメチルヒドラジニル)-2-ペンチル-2,3-ジヒドロピラン-6-オ0
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