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1

Essential oil composition of Taraxacum officinale

100%

Bylka W., Matlawska I., Franski R.

Acta Physiologiae Plantarum

|

2010

|

tom 32

|

nr 2

The gas chromatography–mass spectrometry (GC–MS) analysis of essential oil obtained by hydrodistillation from the flower of Taraxacum officinale L. revealed the presence of 25 compounds with 1,3-dimethylbenzene, 1,2-dimethylbenzene, 1-ethyl-3-methylbenzene, heneicosane and tricosane as the main components.

2

Isoscutellarein derivatives of Malope trifida (Malvaceae)

100%

Sikorska M., Matlawska I., Franski R.

Herba Polonica

|

2003

|

tom 49

|

nr 3-4

3

Sulphated flavonoid glycosides from leaves of Atriplex hortensis

100%

Bylka W., Stobiecki M., Franski R.

Acta Physiologiae Plantarum

|

2001

|

tom 23

|

nr 3

4

8-Hydroxyflavonoid glucuronides of Malope trifida

100%

Sikorska M., Matlawska I., Franski R.

Acta Physiologiae Plantarum

|

2004

|

tom 26

|

nr 3

5

Application of mass spectrometry to structural identification of flavonoid monoglycosides isolated from shoot of lupin [Lupinus luteus L.]

88%

Franski R., Bednarek P., Siatkowska D., Wojtaszek P., Stobiecki M.

Acta Biochimica Polonica

|

1999

|

tom 46

|

nr 2

Flavonoid glycosides constitute important group of plant secondary metabolites. This class of natural products play significant role in different physiological processes. A new methodological approach where mass spectrometric techniques are applied to structural studies of this class of compounds is presented. Four flavonoid O-monoglycosides and one C-monoglycoside were isolated from green parts of lupin (Lupinus luteus L.). Several different mass spectrometric techniques were applied to structural elucidation of isolated compounds. Desorption ionization mass spectrometry was used for registration of mass spectra of intact and derivatized (permethylated) flavonoid glycosides. In some cases electron impact mass spectra of permethylated compounds were also recorded. Methylated samples after methanolysis and further derivatization of free hydroxyl groups (methylation or acetylation) were analyzed with gas chromatography-mass spectrometry. Combined information drawn from the registered mass spectra enabled us to define molecular mass, structure of aglycones and sugars, and positions of glycosidic bonds on the aglycon. Structures of four flavonoid monoglycosides were elucidated as follows: genistein 7-O-glucoside (1), genistein 4'-O-glucoside (2), 2'-hydroxygenistein 7-O-glucoside (3), and apigenin or genistein 8-C-glycoside (5). For the fourth O-glycoside (4) only molecular mass and masses of the aglycone and sugar were estimated.

Ograniczanie wyników

3 Acta Physiologiae Plantarum

1 Acta Biochimica Polonica

1 Herba Polonica

5 Franski R.

3 Matlawska I.

2 Bylka W.

2 Sikorska M.

2 Stobiecki M.

1 Bednarek P.

1 Siatkowska D.

1 Wojtaszek P.

1 2010

1 2004

1 2003

1 2001

1 1999

Essential oil composition of Taraxacum officinale

Isoscutellarein derivatives of Malope trifida (Malvaceae)

Sulphated flavonoid glycosides from leaves of Atriplex hortensis

8-Hydroxyflavonoid glucuronides of Malope trifida

Application of mass spectrometry to structural identification of flavonoid monoglycosides isolated from shoot of lupin [Lupinus luteus L.]