2-acetyl-3-hydroxy-2-cyclopenten-1-one
2-acetyl-3-hydroxycyclopent-2-en-1-one 2-acetyl-3-hydroxy-cyclopent-2-en-1-one 2-ethanoyl-3-hydroxy-cyclopent-2-en-1-one
2-acetyl-3-hydroxycyclopent-2-en-1-on 2-acétyl-3-hydroxycyclopent-2-en-1-one 2-アセチル-3-ヒドロキシシクロペント-2-エン-1-オン
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