title: Polycitone B and prepolycitrin A: two novel alkaloids from the marine ascidian Polycitor africanus.
abstract: Two novel compounds, polycitone B (4) and prepolycitrin A (3), were isolated from the marine ascidian Polycitor africanus. The structures of these new dibromotyrosine metabolites were established mainly on the basis of NMR spectroscopic data. Isolation of compound 3 supports the earlier suggestion that it is the bioprecursor of polycitrin A (2).
authors.affiliation: School of Chemistry, Tel-Aviv University, Ramat Aviv 69978, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Rudi
authors.forename: T
authors.initials: T
authors.lastname: Evan
authors.forename: M
authors.initials: M
authors.lastname: Aknin
authors.forename: Y
authors.initials: Y
authors.lastname: Kashman
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D000818:Animals; D005663:Furans / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008956:Models, Chemical; D011758:Pyrroles / Q000737:chemistry / Q000302:isolation & purification*; D014561:Urochordata / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D005663:Furans; D011758:Pyrroles; C412849:polycitone B; C412848:prepolycitrin A