Ergosterol

Lumisterol; Pro-Vitamin D2; Provitamin D 2; D2, Pro-Vitamin; Pro Vitamin D2
A steroid of interest both because its biosynthesis in FUNGI is a target of ANTIFUNGAL AGENTS, notably AZOLES, and because when it is present in SKIN of animals, ULTRAVIOLET RAYS break a bond to result in ERGOCALCIFEROL.