This product is the intermediate of isadolin. As a mu opioid receptor agonist, aishadurin acts on mu opioid receptor, so as to play a role in the treatment of diarrhea irritable bowel syndrome (IBS-D). It is the first oral effective and local therapeutic drug with a unique mechanism of action; The drug has mixed opioid receptor activity and is μ Receptor antagonists are also delta opioid receptor agonists and kappa receptor agonists. Taking drugs while eating can significantly reduce the symptoms of abdominal pain and diarrhea in IBS-D patients. Irritable bowel syndrome (IBS) is a common gastrointestinal disease, and aisadoulin is a mixed drug μ Receptor agonists δ Receptor antagonists κ Receptor agonists for the remission of diarrhea irritable bowel syndrome (IBS-D). Studies have shown that isadolin can significantly improve the clinical symptoms of IBS-D patients, with good tolerance and less adverse reactions.