| abstract |
FIELD: chemistry. n SUBSTANCE: present invention provides a dihydropyridazine-3,5-dione derivative or a pharmaceutically acceptable salt thereof, a prophylactic and / or therapeutic agent for hyperphosphatemia, secondary hyperparathyroidism and chronic renal failure, comprising the compound as an active ingredient. n EFFECT: present enables to solve problems that arise when using phosphorus adsorbents. n 18 cl, 45 dwg, 418 ex |