5,6-dihydro-7H-indeno[5,6-b]furan-7-one
5,6-dihydro-cyclopenta[f]benzofuran-7-one 5,6-dihydrocyclopenta[f]benzofuran-7-one 5,6-dihydrocyclopenta[f][1]benzoxol-7-one
5,6-dihydrocyclopenta[f][1]benzofuran-7-on 5,6-dihydrocyclopenta[f][1]benzofuran-7-one 5,6-ジヒドロシクロペンタ[f][1]ベンゾフラン-7-オン
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