9,10-Secoergostane derivatives, e.g. ergocalciferol, i.e. vitamin D2

Full Title

Medicinal preparations containing organic active ingredients > Compounds containing 9, 10- seco- cyclopenta[a]hydrophenanthrene ring systems > 9,10-Secoergostane derivatives, e.g. ergocalciferol, i.e. vitamin D2