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3,4-di(pent-4-ynyl)-cyclobut-3-ene-1,2-dione 3,4-di(pent-4-ynyl)cyclobut-3-ene-1,2-quinone 3,4-di(pent-4-ynyl)cyclobut-3-ene-1,2-dione 3,4-di(pent-4-inyl)cyclobut-3-en-1,2-dion 3,4-di(pent-4-ynyl)cyclobut-3-ène-1,2-dione 3,4-ジ(ペント-4-インイル)シクロブタ-3-エン-1,2-ジオン
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