4-Hydroxy-2-nitro-6-(trifluoromethoxy)pyridine-3-acetic acid
4-Hydroxy-2-nitro-3-(trifluoromethoxy)pyridine-6-acetic acid
3-Hydroxy-2-methoxy-5-(trifluoromethoxy)pyridine-6-acetic acid
3-Hydroxy-5-nitro-6-(trifluoromethoxy)pyridine-2-acetic acid
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