Two new triterpenoid saponins from Pittosporum senacia Putterlick (Pittosporaceae).
Magn Reson Chem
; 50(12): 798-802, 2012 Dec.
Article
em En
| MEDLINE
| ID: mdl-23015454
ABSTRACT
From the branches of Pittosporum senacia Putterlick (Pittosporaceae), two new triterpenoid saponins, senaciapittosides A and B (1, 2), were isolated. Their structures were elucidated by extensive analysis of one- and two-dimensional nuclear magnetic resonance spectroscopy, high-resolution electrospray ionization mass spectrometry (HR-ESIMS) and chemical evidence as 3-O-[ß-D-glucopyranosyl-(1 â 2)]-[α-L-arabinopyranosyl-(1 â 3)]-[α-L-arabinofuranosyl-(1 â 4)]-ß-D-glucuronopyranosyl oleanolic acid 28-O-ß-D-glucopyranosyl ester (1) and 3-O-[ß-D-glucopyranosyl-(1 â 2)]-[α-L-arabinopyranosyl-(1 â 3)]-[α-L-arabinofuranosyl-(1 â 4)]-ß-D-glucuronopyranosyl-22-O-α-L-arabinopyranosyl-21-acetoxy R1-barrigenol (2). Compound 2 presents an unusual glycosylation at C-22 of its aglycone.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Saponinas
/
Triterpenos
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Extratos Vegetais
/
Rosales
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article