Uridine 5-monophosphate-13C9,15N2 (5- Uridylic acid-13C9,15N2) dilithium is 13C and 15N-labeled Uridine 5-monophosphate (HY-101981). Uridine 5-monophosphate (5-Uridylic acid) is an orally active mitochondrial ATP-dependent potassium channel activator that has a protective effect on the heart. Uridine 5-monophosphate can promote the synthesis of CDP-choline and induce apoptosis in intestinal epithelial cells, which is beneficial for gut development and reduces diarrhea[1][2][3].