Fluconazole -13C2,15N (UK-49858-13C2,15N) is the 13 C and 15 N labeled isotope of Fluconazole. Fluconazole (UK-49858) is a triazole antifungal agent with excellent activities against a broad range of fungi, especially against Candida albicans. Fluconazole inhibits C. albicans and Candida kefyr with IC 99 s range from 0.20 μg/mL to 0.39 μg/mL.