2,5-Dihydroxy-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine
2,4-Dihydroxy-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine
3,5-Diamino-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine
3,4-Diamino-5-hydroxy-2-(trifluoromethoxy)pyridine
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