title: Investigation of a betainic alkaloid from Punica granatum.
abstract: Spectroscopic investigations reveal that a hydroquinone pyridinium alkaloid isolated from the leaves of pomegranates Punica granatum L. (X-ray) exists as a mixture of a conjugated and a cross-conjugated heterocyclic mesomeric betaine in aqueous and DMSO-d6 solution. Twofold deprotonation yields an anionic tripole.
authors.affiliation: Clausthal University of Technology, Institute of Organic Chemistry, Leibnizstrasse 6, D-38678 Clausthal-Zellerfeld, Germany. schmidt@ioc.tu-clausthal.de
authors.forename: Andreas
authors.initials: A
authors.lastname: Schmidt
authors.forename: Thorsten
authors.initials: T
authors.lastname: Mordhorst
authors.forename: Martin
authors.initials: M
authors.lastname: Nieger
mesh_terms: D000470:Alkaloids / Q000737:chemistry*; D029561:Lythraceae / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure
chemical_list: D000470:Alkaloids