title: rac-12,14-Dicyclo-propyl-5,8,13,18,21-penta-oxapenta-cyclo-[13.8.0.0.0.0]tricosa-1(15),2(11),3,9(10),16,22(23)-hexa-ene.
abstract: The mol-ecule of the title compound, C(24)H(24)O(5), has crystallographic twofold symmetry, with the central O atom lying on the rotation axis. The dihedral angle between the best planes of the benzene rings fused to the oxepine fragment is 38.5 (1)°. The dioxine ring adopts a twist form with the ethyl-ene group C atoms deviating by 0.472 (5) and -0.248 (6) Å from the plane defined by the remaining ring atoms.
authors.affiliation: Chemistry Department, Moscow State University, 119991 Moscow, Russia.
authors.forename: Viktor A
authors.initials: VA
authors.lastname: Tafeenko
authors.forename: Leonid A
authors.initials: LA
authors.lastname: Aslanov
authors.forename: Nikolay A
authors.initials: NA
authors.lastname: Puretskiy
authors.forename: Aleksander N
authors.initials: AN
authors.lastname: Fedotov
authors.forename: Sergei S
authors.initials: SS
authors.lastname: Mochalov