Did you mean: 22-Dihydro Ergocalciferol
22-Dihydroergocalciferol is a form of vitamin D, also known as vitamin D₄. It has the systematic name--9,10-seco-5,7,10-ergostatrien-3-ol.
Vitamin D₄ is found in certain mushrooms, being produced from ergosta-5,7-dienol instead of ergosterol. Wikipedia
Formula: C28H46O
ChemSpider ID: 4574179