title: gamma-Glutamyl dipeptides in Petiveria alliacea.
abstract: Three gamma-glutamyl dipeptides have been isolated from Petiveria alliacea L. roots. These dipeptides include (S(C2)R(C7))-gamma-glutamyl-S-benzylcysteine together with two diastereomeric sulfoxides, namely (S(C2)R(C7)R(S))- and (S(C2)R(C7)R(S))-gamma-glutamyl-S-benzylcysteine S-oxides (gamma-glutamyl-petiveriins A and B, respectively). Their structures and absolute configurations have been determined by NMR, MALDI-HRMS, IR and CD spectroscopy, and confirmed by comparison with authentic compounds obtained by synthesis.
authors.affiliation: Department of Chemistry, State University of New York at Albany, 12222, USA.
authors.forename: Roman
authors.initials: R
authors.lastname: Kubec
authors.forename: Rabi A
authors.initials: RA
authors.lastname: Musah
mesh_terms: D002942:Circular Dichroism; D004151:Dipeptides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D029602:Phytolaccaceae / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013237:Stereoisomerism
chemical_list: D004151:Dipeptides