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4-Hydroxy-6-indolecarboxylic acid

4-Hydroxy-6-mercaptopyrazolo[3,4-d]pyrimidine

4-Hydroxy-6-methoxy-3-methyl-chromen-2-one

4-Hydroxy-6-methoxycoumarin

4-Hydroxy-6-methoxyquinoline

4-Hydroxy-6-methoxyquinoline-3-carboxylic acid

4-Hydroxy-6-methyl indole

4-Hydroxy-6-methyl-(1H)indazole

4-Hydroxy-6-methyl-2H-pyrano[3,2-c]quinoline-2,5(6h)-dione

4-Hydroxy-6-methyl-2-phenylquinoline