Taxonomic group: plant / Streptophyta (Phylum: Streptophyta)
Organ / tissue: leaf
 
NCBI PubMed ID: 6512533
Publication DOI: 10.1021/np50035a009
Journal NLM ID: 7906882
Publisher: American Society of Pharmacognosy
Institutions: Dipartimento di Biología, Università di Milano, Milano, Italy, Istituto di Farmacologia e Farmacognosia, Università di Milano, Milano, Italy, Dipartimento di Chimica Organica, Università di Pavia, Pavia, Italy

Six flavonol glycosides and ent-epicatechin were isolated from Dryas octopetala and their structures elucidated by chemical and spectroscopic methods. Two new flavonoids, 3-O-α-L-arabinofuranosyl-8-methoxyquercetin (2) and 3-O-β-galactopyranosyl-8-methoxykaempferol (6), were identified along with 3-O-β-D-galactopyranosylquercetin (hyperin) (3), 3-O-α-L-arabinofuranosylquercetin (avicularin) (5), 3-O-β-L-arabinopyranosylquercetin (4), and 3-O-β-D-galactopyranosyl-8-methoxyquercetin (1).

flavonol glycosides, Dryas octopetala

Structure type: monomer
Location inside paper: p. 810, structure 5
Trivial name: avicularin, foeniculin, guaijaverin
Compound class: glycoside, flavonoid glycoside, flavonol glycoside
 
Methods: 1H NMR, EI-MS, methylation, IR, TLC, acid hydrolysis, GC, extraction, optical rotation measurement, acetylation, CC, RP-HPLC, melting point determination, derivatization, evaporation
 
Related record ID(s): 50537, 50538, 50539, 50540, 50542
NCBI Taxonomy refs (TaxIDs): 57948
Reference(s) to other database(s): CCSD:49972, CBank-STR:524
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NMR conditions: in CD3OD        [as TSV]

1H NMR data: Linkage Residue H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16 3 aLArap 5.42 4.35 3.93 3.93 3.55     xXQuercetin 6.25 6.43 7.43 7.65 6.91 7.43 7.65

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