Cholecalciferol EP Impurity E Catalogue D546405 CAS 17592-07-3 M.W 384.65 M.F C27H44O Specifications FAQs Synonyms:(S)-4-methyl-3-((E)-2-((1R,3aR,7aR)-7a-methyl-1-((R)-6-methylheptan-2-yl)-2,3,3a,6,7,7a-hexahydro-1H-inden-4-yl)vinyl)cyclohex-3-en-1-ol