title: Methyl 1,2,4,5,6,10b-hexahydro-8,9-methylenedioxy-2- oxobenzo[d]cyclopenta[b]azepine-4-carboxylate.
abstract: The title compound contains the tetracyclic A-B-C-E ring system of cephalotaxus alkaloids. Unexpectedly, the five-membered-ring plane is twisted 67.2 degrees from the aromatic ring plane and, like cephalotaxine, the seven-membered ring is oriented in a boat form with the nitrogen at the prow.
authors.affiliation: Department of Geology, Southern Illinois University, Carbondale 62901.
authors.forename: P D
authors.initials: PD
authors.lastname: Robinson
authors.forename: D H
authors.initials: DH
authors.lastname: Hua
authors.forename: Y
authors.initials: Y
authors.lastname: Hong
authors.forename: S W
authors.initials: SW
authors.lastname: Miao
mesh_terms: D001552:Benzazepines / Q000138:chemical synthesis / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003460:Crystallization; D008968:Molecular Conformation; D015394:Molecular Structure; D014961:X-Ray Diffraction
chemical_list: D001552:Benzazepines; C077772:methyl 1,2,4,5,6,10b-hexahydro-8,9-methylenedioxy-2-oxobenzo(d)cyclopenta(b)azepine-4-carboxylate