6-Hydroxy-3-(perchlorophenyl)pyridine-2-acetic acid
3-Hydroxy-5-(perchlorophenyl)pyridine-2-acetic acid
2-Hydroxy-5-(perchlorophenyl)pyridine-4-acetic acid
2-Hydroxy-5-(perchlorophenyl)pyridine-3-acetic acid
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