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