4-hydroxy-7-methyl-5H-furo[3,2-g]chromen-5-one
4-hydroxy-7-methylpyrano[3,2-f][1]benzoxol-5-one 4-hydroxy-7-methyl-pyrano[3,2-f]benzofuran-5-one 4-hydroxy-7-methyl-pyrano[3,2-f][1]benzoxol-5-one
4-hydroxy-7-methylfuro[3,2-g]chromen-5-on 4-hydroxy-7-méthylfuro[3,2-g]chromen-5-one 4-ヒドロキシ-7-メチルフロ[3,2-g]クロメン-5-オン
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