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New Galloylated Flavonoid Glycosides from Geranium stepporum Davis
Author(s) -
Şöhretoğlu Didem,
Sakar Mahmut Koray,
Sterner Olov
Publication year - 2009
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200800346
Subject(s) - chemistry , quercetin , flavonoid , glycoside , stereochemistry , biochemistry , antioxidant
Two new galloylated flavonoid glycosides, quercetin‐3‐ O ‐(3″‐ O ‐galloyl)‐ β ‐glucopyranoside ( 1 ) and quercetin‐3‐ O ‐(3″‐ O ‐galloyl)‐ β ‐galactopyranoside ( 2 ) were isolated from the aerial parts of Geranium stepporum along with the four known flavonoids, quercetin 3‐ O ‐ β ‐glucopyranoside ( 3 ), quercetin 3‐ O ‐ β ‐galactopyranoside ( 4 ), quercetin 3‐ O ‐(6″‐ O ‐galloyl)‐ β ‐glucopyranoside ( 5 ) and quercetin 3‐ O ‐(6″‐ O ‐galloyl)‐ β ‐galactopyranoside ( 6 ). The structure elucidation of the isolated compounds was accomplished by spectroscopic methods (UV, 1D‐ and 2D‐NMR, and ESI‐TOF‐MS).