title: Chemical compounds isolated from Talinum triangulare (Portulacaceae).
abstract: This first phytochemical study of Talinum triangulare Leach (Portulacaceae), also known as 'cariru', which is a commonly consumed food in Northern Brazil, allowed the isolation and structural determination of four new compounds: one acrylamide, 3-N-(acryloyl, N-pentadecanoyl) propanoic acid (5), and three new phaeophytins named (15(1)S, 17R, 18R)-Ficuschlorin D acid (3(1),3(2)-didehydro-7-oxo-17(3)-O-phytyl-rhodochlorin-15-acetic acid), (13), Talichorin A (17R, 18R)-phaeophytin b-15(1)-hidroxy, 15(2),15(3)-acetyl-13(1)-carboxilic acid (14), and (15(1)S, 17R, 18R)-phaeophytin b peroxylactone or (15(1)S, 17R, 18R)-hydroperoxy-ficuschlorin D (16), together with twelve known compounds, including four phaeophytins (11,12, 15 and 17). The structures of the compounds were established on the basis of 1D and 2D NMR, IR, HRESI-MS spectra, including GC-MS, and HPLC-UV analysis, as well as comparisons with the literature data. The CD spectra data analysis were used to define the absolute configuration of phaeophytins 12 (13(2)R, 17R, 18R)-13(2)-hydroxyphaeophytin a, 13 and 16, 15 (15(1)S, 17R, 18R)-3(1),3(2)-didehydro-15(1)-hydroxyrhodochlorin-15-acetic acid δ-lactone-15(2)-methyl-17(3)-phytyl ester and 17 (17R, 18R)-purpurin 18-phytyl ester.
authors.affiliation: Departamento de Química, ICE, Universidade Federal Rural do Rio de Janeiro, BR 465 KM 07, 23890-000 Seropédica, RJ, Brazil. Electronic address: anamorim07@hotmail.com.
authors.forename: Ana Paula
authors.initials: AP
authors.lastname: de Oliveira Amorim
authors.affiliation: Departamento de Química, ICE, Universidade Federal Rural do Rio de Janeiro, BR 465 KM 07, 23890-000 Seropédica, RJ, Brazil.
authors.forename: Almir Ribeiro
authors.initials: AR
authors.lastname: de Carvalho
authors.affiliation: Departamento de Farmacologia, Faculdade de Medicina de Ribeirão Preto, Universidade de Ribeirão Preto, Ribeirão Preto, SP, Brazil.
authors.forename: Norberto Peporine
authors.initials: NP
authors.lastname: Lopes
authors.affiliation: Departamento de Química, ICE, Universidade Federal Rural do Rio de Janeiro, BR 465 KM 07, 23890-000 Seropédica, RJ, Brazil.
authors.forename: Rosane Nora
authors.initials: RN
authors.lastname: Castro
authors.affiliation: Departamento de Química, ICE, Universidade Federal Rural do Rio de Janeiro, BR 465 KM 07, 23890-000 Seropédica, RJ, Brazil.
authors.forename: Marcia Cristina Campos
authors.initials: MC
authors.lastname: de Oliveira
authors.affiliation: Departamento de Química, ICE, Universidade Federal Rural do Rio de Janeiro, BR 465 KM 07, 23890-000 Seropédica, RJ, Brazil. Electronic address: mgeraldo@ufrrj.br.
authors.forename: Mário Geraldo
authors.initials: MG
authors.lastname: de Carvalho
mesh_terms: D001938:Brazil; D002734:Chlorophyll / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D002942:Circular Dichroism; D008401:Gas Chromatography-Mass Spectrometry; D009682:Magnetic Resonance Spectroscopy; D019684:Magnoliopsida; D064209:Phytochemicals / Q000032:analysis* / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D029622:Portulacaceae / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D064209:Phytochemicals; D010936:Plant Extracts; D002734:Chlorophyll
keywords: Acrylamide; Ficuschlorin; Phaeophytin; Portulacaceae; Talichlorin A; Talinum triangulare