Nifursol-15N2,d2 is the deuterium and 15N-labeled Nifursol (HY-B1703). Nifursol is an orally active veterinary antibiotic. Nifursol inhibits Histomonas meleagridis. Nifursol prevents histomoniasis in turkeys. Nifursol is widely used in studies of Escherichia coli gastroenteritis in Salmonella-infected poultry and aquatic animals[1][2][3].