title: (20S)-20-Acetamido-18-chloro-5α-pregnan-3β-yl acetate.
abstract: In the title compound, C(25)H(40)ClNO(3), prepared by the thermolysis of (20S)-O,N-diacetyl-20-amino-N-chloro-3β-hydr-oxy-5α-pregnane, the three six-membered rings adopt chair conformations while the five-membered ring is in an envelope conformation. The ester group attached to ring A is in an equatorial position. All the rings are trans-fused. Intra-molecular C-H⋯O and C-H⋯Cl inter-actions occur. The crystal structure is stabilized by inter-molecular N-H⋯O and C-H⋯O inter-actions close contacts occur.
authors.affiliation: Department of Chemistry, The University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4.
authors.forename: Michael
authors.initials: M
authors.lastname: Benn
authors.forename: Kanwal Nain
authors.initials: KN
authors.lastname: Vohra
authors.forename: Masood
authors.initials: M
authors.lastname: Parvez