title: 6-Hy-droxy-imino-5α-cholestane.
abstract: The title compound, C(27)H(47)NO, is a steroid derivative composed of a saturated carbon fused-ring framework with an alkyl side chain. Ring bond lengths have normal values with an average of 1.533 (2) Å, while the cholestane side chain shows an average bond length of 1.533 (2) Å. The three cyclohexane rings adopt chair conformations or close to chair conformations while the cyclopentane ring is twisted. The cholesterol side-chain is fully extended with a gauche-trans conformation of the terminal methyl groups. There are eight chiral centres in the molecule; the absolute configuration of these sites was determined from the structure presented. There are two molecules in the asymmetric unit; in one, the alkyl chain is disordered over two sets of sites [occupancy ratios of 0.50:0.50 and 0.67:0.33].
authors.affiliation: Department of Chemistry, Aligarh Muslim University, Aligarh 202 002,  India.
authors.forename: Shams
authors.initials: S
authors.lastname: Uzzaman
authors.forename: Hena
authors.initials: H
authors.lastname: Khanam
authors.forename: Ashraf
authors.initials: A
authors.lastname: Mashrai
authors.forename: Yahia Nasser
authors.initials: YN
authors.lastname: Mabkhot
authors.forename: Ahmad
authors.initials: A
authors.lastname: Husain