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