Cholecalciferol EP Impurity A Catalogue D546401 CAS 22350-41-0 M.W 384.65 M.F C27H44O Specifications FAQs Cholecalciferol EP Impurity A (5,6-trans-Cholecalciferol, 5,6-trans-Vitamin D3)Synonyms:(1S,3E)-3-[(2E)-2-[(1R,3aS,7aR)-1-[(1R)-1,5-dimethylhexyl]octahydro-7a-methyl-4H-inden-4-ylidene]ethylidene]-4-methylene-Cyclohexanol