title: Four cyclopeptide alkaloids from Discaria longispina.
abstract: The isolation of the cyclopeptide alkaloids, adoutine-Y', discarine-B, discarine-E, and discarine-X, a new 14-membered cyclopeptide alkaloid from D. longispina, are reported. The structure of the new alkaloid was elucidated by spectroscopic methods and by chemical degradation.
authors.affiliation: Departamento de Quimica, Universidade Federal de Santa Maria, RS, Brazil.
authors.forename: E C
authors.initials: EC
authors.lastname: Machado
authors.forename: A
authors.initials: A
authors.lastname: Alvarez Filho
authors.forename: A F
authors.initials: AF
authors.lastname: Morel
authors.forename: F D
authors.initials: FD
authors.lastname: Monache
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D001118:Argentina; D001938:Brazil; D009682:Magnetic Resonance Spectroscopy; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000470:Alkaloids; D010456:Peptides, Cyclic