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                        Benzonitrile, 3-[(2,3-dihydro-1,3-dioxo-2-phenyl-1H-isoindol-4-yl)oxy]-CAS:63197-28-4Formula:C21H12N2O3 
                     
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                        1H-Isoindole-1,3(2H)-dione, 2-(9,10-dihydro-9-oxo-3-acridinyl)-CAS:63926-80-7Formula:C21H12N2O3 
                     
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                        1H-Isoindole-1,3(2H)-dione, 2-(9,10-dihydro-9-oxo-4-acridinyl)-CAS:63926-81-8Formula:C21H12N2O3 
                     
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                        6-aminonaphth[2,3-c]acridine-5,8,14(13H)-trioneCAS:81-73-2Formula:C21H12N2O3 
                     
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                        4-(1,3-BENZODIOXOL-5-YL)-2-METHYL-5-OXO-5H-INDENO[1,2-B]PYRIDINE-3-CARBONITRILECAS:439108-77-7Formula:C21H12N2O3 
                     
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                        1H-Benzimidazole-5-carboxylic acid, 2-(9-oxo-9H-fluoren-4-yl)-CAS:915142-38-0Formula:C21H12N2O3 
                     
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                        2H-Pyran-3-carbonitrile,
5-(2,3-dihydro-1,3-dioxo-1H-inden-2-yl)-2-imino-6-phenyl-CAS:915281-08-2Formula:C21H12N2O3 
                     
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                        1H-Benz[f]indene-1,3(2H)-dione,
2-(4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl)-CAS:918158-10-8Formula:C21H12N2O3 
                     
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                        2H-Naphtho[1,2-b]pyran-2-one, 4-(5-phenyl-1,3,4-oxadiazol-2-yl)-CAS:928652-16-8Formula:C21H12N2O3 
                     
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                        3H-Naphtho[2,1-b]pyran-3-one, 1-(5-phenyl-1,3,4-oxadiazol-2-yl)-CAS:928652-18-0Formula:C21H12N2O3