Isolation and characterization of an unknown flavonoid in dry extracts from Passiflora incarnata

被引：14

作者：

Chimichi, S

Mercati, V

Moneti, G

Raffaelli, A

Toja, E

机构：

[1] Univ Florence, CNR, Ctr Chim & Struttura Composti Eterocicl, I-50121 Florence, Italy

[2] Univ Florence, Dipartimento Chim Organ, I-50121 Florence, Italy

[3] Aboca SS, I-52037 Sansepolcro, AR, Italy

[4] Univ Florence, CISM, Firenze, Italy

[5] Univ Pisa, Dipartimento Chim, I-56100 Pisa, Italy

来源：

NATURAL PRODUCT LETTERS | 1998年 / 11卷 / 03期

关键词：

C-glycosylflavonoids; Passiflora incarnata L; mass spectrometry; H-1-NMR; C-13-NMR;

D O I：

10.1080/10575639808044951

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

HPLC analyses of dry extracts obtained from Passiflora incarnata revealed the presence of ten known flavonoids whose structures were characterised by ionspray ionization tandem mass spectrometry; in addition, three unidentified peaks, Fl, F2, and F3 appeared in the flavonoid region of the chromatogram. Two components were detected in F3 by on-line HPLC-ISI-MS analysis, named F3a and F3b. F2 was demonstrated to be a structural isomer of schaftoside (1), and F3a of isoschaftoside (2), with apigenin as the common aglycone and molecular weight 564. Mass spectra and 2D-NMR experiments allowed us to assign the structure of 6-beta-D-glucopyranosyl-8-beta-D-ribopyranosyl apigenin to the new di-C-glycosylflavonoid F2.

引用

页码：225 / 232

页数：8

共 12 条

[1]

LI QM, 1991, J CHROMATOGR-BIOMED, V562, P435, DOI 10.1016/0378-4347(91)80597-6

[2]

MEIER B, 1995, Z PHYTOTHER, V0016, P00115

[3] Mass spectrometric characterization of flavonoids in extracts from Passiflora incarnata [J].

Raffaelli, A ;

Moneti, G ;

Mercati, V ;

Toja, E .

JOURNAL OF CHROMATOGRAPHY A, 1997, 777 (01) :223-231

[4]

REHWALD A, 1995, PHYTOCHEM ANALYSIS, V6, P96

[5]

Rehwald A., 1994, Pharmaceutica Acta Helvetiae, V69, P153

[6]

Saad H.E., 1994, MANS J PHARM SCI, V10, P254

[7]

SCHMIDT PC, 1993, DTSCH APOTH ZTG, V0133, P04457

[8]

[No title captured]

[9]

[No title captured]

[10]

[No title captured]

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