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4-Hydroxyindole

6-Hydroxyindole-2-carboxylic acid

2-Hydroxy-5-iodopyridine

8-Hydroxy-7-iodo-5-quinolinesulfonic acid

2-Hydroxyisobutyric acid

4-Hydroxyisoleucine

2-Hydroxyisonicotinic acid

5-Hydroxyisophthalic acid

4-Hydroxyisophthalic acid

4-Hydroxy-4-isopropoxydiphenylsulfone

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