Precursor to metabolite: Isavuconazonium to Isavuconazole

Isavuconazonium is converted to Isavuconazole by esterase.

The pair

Isavuconazonium — Broad-spectrum azole prodrug that shortens rather than prolongs the QT interval.
Isavuconazole — Broad triazole antifungal for aspergillosis and mucormycosis.