1,25-dihydroxyergocalciferol

1,25-di·hy·drox·y·er·go·cal·cif·er·ol

(dī'hī-drok'sē-ĕr'gō-kal-sif'ĕr-ol),
A biologically active metabolite of vitamin D2.
Synonym(s): ercalcitriol