1-(2-methyl-1,1-dioxido-2,5-dihydro-2-thienyl)ethanone
1-(2-methyl-1,1-dioxo-5H-thiophen-2-yl)-ethanone 1-(1,1-diketo-2-methyl-5H-thiophen-2-yl)ethanone 1-(2-methyl-1,1-dioxo-5H-thiophen-2-yl)ethanone
1-(5-methyl-1,1-dioxo-2H-thiophen-5-yl)ethanon 1-(5-méthyl-1,1-dioxo-2H-thiophén-5-yl)éthanone 1-(5-メチル-1,1-ジオキソ-2H-チオフェン-5-イル)エタノン
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