title: Dimethyl 11,13-dimethyl-16-[1,2-bis-(methoxy-carbon-yl)ethen-yl]-12-oxo-16,17-dioxa-18-aza-hexa-cyclo-[7.5.1.1.1.1.0]octa-deca-2,7-diene-2,3-dicarboxyl-ate.
abstract: The title compound, C(27)H(29)NO(11), is a product of the tandem 'domino' Diels-Alder reaction. The mol-ecule comprises a fused hexa-cyclic system containing four five-membered rings (two dihydro-furan and two tetra-hydro-furan) in the usual envelope conformations and two six-membered rings (tetra-hydro-pyridinone and piperidine) adopting slightly flattened boat and chair conformations, respectively. The dispositions of the carboxyl-ate substituents relative to each other are determined by both steric reasons and inter-molecular C-H⋯O hydrogen bonding and attractive anti-parallel C=O⋯C=O inter-actions [C⋯O = 2.995 (2) Å].
authors.forename: Atash V
authors.initials: AV
authors.lastname: Gurbanov
authors.forename: Eugeniya V
authors.initials: EV
authors.lastname: Nikitina
authors.forename: Elena A
authors.initials: EA
authors.lastname: Sorokina
authors.forename: Fedor I
authors.initials: FI
authors.lastname: Zubkov
authors.forename: Victor N
authors.initials: VN
authors.lastname: Khrustalev