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Benzophenone Rhamnosides and Chromones from Hypericum seniawinii Maxim.

ABSTRACT: Two new benzophenone glycosides, hypersens A and B, along with four known compounds, (S)-(+)-5,7-dihydroxy-2-(1-methylpropyl) chromone (3), 5,7-dihydroxy-2-isopropylchromone (4), urachromone B (5), and 3-8'' bisapigenin (6), were isolated from Hypericum seniawinii. The structures of new compounds (1 and 2) were elucidated according to comprehensive spectroscopic data analyses. The absolute configurations of 1 and 2 were determined by electronic circular dichroism (ECD) calculations. All isolated compounds were evaluated for their neuroprotective effect using corticosterone-induced PC12 cell injury. In addition, compounds 1-6 were evaluated for their anti-inflammatory activity in lipopolysaccharide-induced RAW 264.7 cells. Compound 6 was a biflavonoid and significantly inhibited the production of nitric oxide with an IC₅₀ value of 11.48 ± 1.23 μM.

SUBMITTER: Xia J

PROVIDER: S-EPMC9609419 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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Benzophenone Rhamnosides and Chromones from Hypericum seniawinii Maxim.

Xia Jing J Hu Bo B Qian Mengyu M Zhang Jiayue J Wu Lin L

Molecules (Basel, Switzerland) 20221019 20

Two new benzophenone glycosides, hypersens A and B, along with four known compounds, (S)-(+)-5,7-dihydroxy-2-(1-methylpropyl) chromone (3), 5,7-dihydroxy-2-isopropylchromone (4), urachromone B (5), and 3-8'' bisapigenin (6), were isolated from Hypericum seniawinii. The structures of new compounds (1 and 2) were elucidated according to comprehensive spectroscopic data analyses. The absolute configurations of 1 and 2 were determ ...[more]

PMID: 36296651

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