title: Isolation and NMR spectroscopic clarification of the alkaloid 1,3,7-trimethylguanine from the ascidian Eudistoma maculosum.
abstract: The alkaloid 1,3,7-trimethylguanine was isolated from the ascidian Eudistoma maculosum, and differences in the NMR spectroscopic data for this compound compared with data in the literature are due to ammonium salt formation.
authors.affiliation: Department of Chemistry, University of Wollongong, Wollongong, NSW 2522, Australia.
authors.forename: Y
authors.initials: Y
authors.lastname: Berry
authors.forename: J B
authors.initials: JB
authors.lastname: Bremner
authors.forename: A
authors.initials: A
authors.lastname: Davis
authors.forename: S
authors.initials: S
authors.lastname: Samosorn
mesh_terms: D000470:Alkaloids / Q000737:chemistry; D000818:Animals; D006147:Guanine / Q000031:analogs & derivatives* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008517:Phytotherapy; D014561:Urochordata
chemical_list: C436784:1,3,7-trimethylguanine; D000470:Alkaloids; D006147:Guanine