Sub Group: Vitamins - Labeled & Unlabeled Catalog Number: 17938 Pricing: 10 mg = Inquire 50 mg = Inquire Formula: C26H40O3 CAS Number: 163217-09-2 Molecular Weight: 400.59 Synonyms: (7E)-19-nor-9,10-seco-14β-cholesta-5,7-dien- 23-yne-1α,3β,25-triol