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5-Hydroxypicolinic acid

3-Hydroxypicolinic acid

4-Hydroxyphthalonitrile

N-Hydroxyphthalimide

4-Hydroxyphthalic acid

Hydroxyphosphono-acetic acid

3-Hydroxy-1-phenyl-1,2,4-triazole

N-(3-Hydroxyphenyl)-4-toluidine

1-(4-Hydroxyphenyl)-1H-tetrazole-5-thiol

4-Hydroxyphenylpyruvic acid