title: Occurrence of carbamoyl-N-hydroxy derivatives of saxitoxin and neosaxitoxin in a xanthid crab Zosimus aeneus.
abstract: Two novel paralytic toxins were isolated from toxic specimens of a xanthid crab Zosimus aeneus inhabiting Ishigaki Island, Okinawa. The structures of two of these were deduced to be carbamoyl-N-hydroxysaxitoxin and carbamoyl-N-hydroxyneosaxitoxin based on electrophoresis, high performance liquid chromatography, electrospray ionization mass spectrometry, 1H NMR, 13C NMR and conversion experiments. They showed specific toxicities of 1700 and 1400 mouse units per mg on i.p. injection into mice.
authors.affiliation: Laboratory of Marine Botany and Environmental Science, Faculty of Fisheries, Kagoshima University, Japan.
authors.forename: O
authors.initials: O
authors.lastname: Arakawa
authors.forename: T
authors.initials: T
authors.lastname: Noguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Shida
authors.forename: Y
authors.initials: Y
authors.lastname: Onoue
mesh_terms: D000818:Animals; D003386:Brachyura / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D051379:Mice; D010084:Oxidation-Reduction; D012530:Saxitoxin / Q000031:analogs & derivatives* / Q000032:analysis
chemical_list: D012530:Saxitoxin; C034902:neosaxitoxin