1-Cyclopentene-1-carboxylicacid, 2-(2-hydroxy-4,6-dimethoxyphenyl)-5-oxo-, d-lactone (7CI); 1,2-Dihydro-7,9-dimethoxycyclopenta[c][1]benzopyran-3,4-dione;5,7-Dimethoxycyclopentenone[2,3-c]coumarin
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