From the rhizomes of Polygonatum alte-lobatum, two new homologous series of 1,4-benzoquinones, polygonaquinones A and B, a novel homoisoflavanone, a new gentrogenin glycoside and 13 known compounds were isolated and characterized. The structures of the new compounds were determined as two homologous series of three 2,5-dihydroxy-3-methyl-6-alkyl-1,4-benzoquinones and three 2-hydroxy-3-methyl-6-alkyl-1,4-benzoquinones, with chain lengths C-21 to C-23, and 4',5,7-trihydroxy-6,8-dimethylhomoisoflavone and gentrogenin 3-O-β-D-glucopyranosyl(1→2)-{β-D-xylopyranosyl(1→3)}-β-D-glucopyranosyl(1→4)-β-D-galactopyranoside.
1, Liliaceae, rhizome, Polygonatum alte-lobatum, 4-benzoquinone, homoisoflavanone, polygonaquinone A, polygonaquinone B, gentrogenin glycoside
NCBI PubMed ID: 9115701Publication DOI: 10.1016/S0031-9422(96)00652-8Journal NLM ID: 0151434Publisher: Elsevier
Institutions: School of Pharmacy, Kaohsiung Medical College, Kaohsiung, Taiwan, China
Methods: 13C NMR, 1H NMR, NMR-2D, IR, FAB-MS, sugar analysis, TLC, ESI-MS, chemical methods, HPLC, extraction
Found