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Título

Phenolic Compounds in External Leaves of Tronchuda Cabbage (Brassica oleracea L. var. costata DC)

AutorFerreres, Federico ; Valentão, Patricia; Llorach, Rafael; Pinheiro, Cristina; Cardoso, Lígia; Pereira, José Alberto; Sousa, Carla; Seabra, Rosa M.; Andrade, Paula B.
Palabras claveTronchuda cabbage
Brassica oleracea L. var. costata DC
Kaempferol derivatives
HPLC-DAD-MS/MS-ESI
HPLC-DAD
Fecha de publicación15-mar-2005
EditorAmerican Chemical Society
CitaciónJournal of Agricultural and Food Chemistry 53(8): 2901-2907 (2005)
ResumenGlycosylated kaempferol derivatives from the external leaves of tronchuda cabbage (Brassica oleracea L. var. costata DC) characterized by reversed-phase HPLC-DAD-MS/MS-ESI were kaempferol 3-O-sophorotrioside-7-O-glucoside, kaempferol 3-O- (methoxycaffeoyl/caffeoyl)sophoroside-7-O-glucoside, kaempferol 3-O-sophoroside-7-O-glucoside, kaempferol 3-O-sophorotrioside-7-O-sophoroside, kaempferol 3-O-sophoroside-7-O-sophoroside, kaempferol 3-O-tetraglucoside-7-O-sophoroside, kaempferol 3-O-(sinapoyl/caffeoyl)sophoroside-7-O-glucoside, kaempferol 3-O-(feruloyl/caffeoyl)sophoroside-7-O-glucoside, kaempferol 3-O-sophorotrioside, kaempferol 3-O-(sinapoyl)sophoroside, kaempferol 3-O-(feruloyl)sophorotrioside, kaempferol 3-O-(feruloyl)sophoroside, kaempferol 3-O-sophoroside, and kaempferol 3-O-glucoside. These acylated derivatives are reported for the first time in nature, with the exception of kaempferol 3-O-(sinapoyl)sophoroside. Quantification of the identified compounds was achieved by HPLC-DAD and carried out in samples cultivated under conventional or organic practices and collected at different times. In general, samples from organic production exhibited higher total phenolics content than those from conventional practices collected in the same period.
Descripción7 pages, 3 tables, 4 figures.
Versión del editorhttp://dx.doi.org/10.1021/jf040441s
URIhttp://hdl.handle.net/10261/17873
DOI10.1021/jf040441s
ISSN1520-5118 (Online)
0021-8561 (Print)
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