| SMILES = CC(C)[C@@H](C)/C=C/[C@@H](C)[C@H]1CC[C@H]2/C(CCC[C@]12C)=C/C=C3/C[C@@H](O)CCC3=C }} | Section2 = }} Ergocalciferol (Deltalin, Eli Lilly and Company)'s a form of Vitamin D, also called vitamin D2. It's the systematic name "(3β,5Z,7E,22E)-9,10-secoergosta-5,7,10(19),22-tetraen-3-ol". It's created from viosterol, which in turn's created when ultraviolet light activates ergosterol.… (More on Ergocalciferol)