| abstract |
The present invention relates to a pyridazinone or pyridazine compound and a derivative and a pharmaceutical composition thereof. Specifically, the present invention provides a pyridazinone or pyridazine compound as shown in formula (I) or (Ia), or a stereoisomer, tautomer, enantiomer, diastereoisomer, resonant body, pharmaceutically acceptable salt, hydrate, solvate, or crystal form thereof. The compound as shown in formula (I) or (Ia) has an excellent agonistic effect and pharmacodynamic property on a thyroid hormone β receptor. |