title: Crystal structure of 3β-acet-oxy-androsta-5,16-dien-17-yl tri-fluoro-methane-sulfon-ate.
abstract: The title compound, C22H29F3O5S [systematic name: (3S,8R,9S,10R,13S,14S)-10,13-dimethyl-17-(tri-fluoro-methylsulfon-yloxy)-2,3,4,7,8,9,10,11,12,13,14,15-dodeca-hydro-1H-cyclo-penta-[a]phenanthren-3-yl acetate], contains a fused four-ring steroidal system. Rings A and C adopt a chair conformation, while rings B and D adopt half-chair and envelope (with the fused CH atom as the flap) conformations, respectively. In the crystal, weak inter-molecular C-H⋯O inter-actions link the mol-ecules into layers parallel to the ab plane.
authors.affiliation: Hangzhou Jiuyuan Gene Engineering Co. Ltd, Hangzhou 310018, Zhejiang, People's Republic of China.
authors.forename: Shengjun
authors.initials: S
authors.lastname: Zhou
authors.affiliation: Department of Chemistry, Xiamen University, Xiamen 361005, People's Republic of China.
authors.forename: Huaqi
authors.initials: H
authors.lastname: Huang
authors.affiliation: Department of Chemistry, Xiamen University, Xiamen 361005, People's Republic of China.
authors.forename: Ting
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Xiamen University, Xiamen 361005, People's Republic of China.
authors.forename: Dangfeng
authors.initials: D
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Xiamen University, Xiamen 361005, People's Republic of China.
authors.forename: Rongbin
authors.initials: R
authors.lastname: Huang
keywords: 3β-acet­oxy­androsta-5,16-dien-17-yl tri­fluoro­methane­sulfonate; C—H⋯O inter­actions; chiral space group; crystal structure