title: The alpha- and beta-epoxides of 3beta-acetoxy-5alpha-lanost-9(11)-en-7-one.
abstract: The structures of 3beta-acetoxy-9alpha,11alpha-epoxy-5alpha-lanost-9(11)-en-7-one and 3beta-acetoxy-9beta,11beta-epoxy-5alpha-lanost-9(11)-en-7-one, C(32)H(52)O(4), differ in their respective substituted cyclohexanone rings but adopt similar conformations in the other three rings. In both of the crystal structures, weak intermolecular C-H...O interactions are present.
authors.affiliation: Department of Chemistry, The University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4. parvez@ucalgary.ca
authors.forename: Masood
authors.initials: M
authors.lastname: Parvez
authors.forename: Oliver E
authors.initials: OE
authors.lastname: Edwards
authors.forename: Zdzisław
authors.initials: Z
authors.lastname: Paryzek