4,5-Diamino-3-(trifluoromethoxy)pyridine-2-sulfonamide
2,3-Diamino-6-(trifluoromethoxy)pyridine-5-sulfonamide
3,6-Diiodo-2-methoxy-5-(trifluoromethoxy)pyridine
4,6-Diiodo-2-methoxy-3-(trifluoromethoxy)pyridine
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