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2,3-DIHYDRO-3-(1-(2,5-DIMETHYLANILINO)ETHYLIDENE)-6-METHYL-4H-PYRAN-2,4-DIONE 2,3-DIHYDRO-3-(1-(2,5-DIMETHYLANILINO)ETHYLIDENE)-6-METHYL-4H-PYRAN-2,4-DIONE