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  • Title: Three new lignan glycosides from the fruits of Forsythia suspense.
    Author: Yan XJ, Peng Y, Liu ZX, Wen J, Liu QB, Li LZ, Song SJ.
    Journal: J Asian Nat Prod Res; 2014; 16(6):602-10. PubMed ID: 24835080.
    Abstract:
    Two new lignan glycosides forsythiayanoside A (1) and forsythiayanoside B (2), one new stereoisomer of lignan glycoside (+)-8-hydroxyepipinoresinol-4-O-β-D-glucopyranoside (3), together with seven known compounds (4-10), were isolated from the fruits of Forsythia suspense (Thunb.) Vahl. Compounds 4 and 10 were isolated from this species for the first time. The structures of 1-3 were elucidated on the basis of chemical and spectral analyses, including 1D and 2D NMR data and HR-ESI-MS. The absolute configurations were determined by the circular dichroism method. All isolates were tested for their cytotoxicities against five human cancer cell lines (A549, Colo-205, Hep-3B, HL60, and KB). In particular, compound 3 showed significant cytotoxicity with IC50 values of 9.48, 7.75, 0.59, 4.06, and 38.38 μM, respectively.
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