6-(Difluoromethyl)-3-methoxy-2-nitropyridine-4-sulfonamide
2-(Difluoromethyl)-5-methoxy-3-nitropyridine-4-sulfonamide
2-(Difluoromethyl)-4-methoxy-5-nitropyridine-3-sulfonamide
2-(Difluoromethyl)-4-methoxy-3-nitropyridine-5-sulfonamide
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