What is Lumisterol?

What is Lumisterol?

Lumisterol is a admixture that is allotment of the vitamin D ancestors of steroid compounds. It is the (9β ,10α) stereoisomer of ergosterol and was produced as a photochemical by-product in the preparation of vitamin D1, which was a admixture of vitamin D2 and lumisterol. Vitamin D2 can be formed from lumisterol by an electrocyclic ring aperture and consecutive sigmatropic hydride shift.