Vitamin

Impurity of Doxercalciferol is an impurity of doxercalciferol, which is a synthetic analog of ergocalciferol (vitamin D2), used as a drug for secondary hyperparathyroidism and metabolic bone disease, and it suppresses parathyroid synthesis and secretion.

1alpha, 25-Dihydroxy VD2-D6 is a deuterated form of vitamin D.

Impurity B of Calcitriol, Calcitriol is the hormonally active form of vitamin D, Calcitriol is the active metabolite of vitamin D3 that activates the vitamin D receptor (VDR).