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Secondary Metabolites with Nitric Oxide Inhibition from Marine-Derived Fungus Alternaria sp. 5102.

ABSTRACT: Two new benzofurans, alternabenzofurans A and B (1 and 2) and two new sesquiterpenoids, alternaterpenoids A and B (3 and 4), along with 18 known polyketides (5-22), were isolated from the marine-derived fungus Alternaria sp. 5102. Their structures were elucidated on the basis of extensive spectroscopic analyses (1D and 2D NMR, HR-ESIMS, and ECD) and X-ray crystallography, as well as the modified Mosher's method. Compounds 2, 3, 5, 7, 9-18, and 20-22 exhibited potent anti-inflammatory activity by inhibiting the production of NO in RAW264.7 cells activated by lipopolysaccharide with IC50 values in the range from 1.3 to 41.1 ?M. Structure-activity relationships of the secondary metabolites were discussed.

SUBMITTER: Chen S

PROVIDER: S-EPMC7460390 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Secondary Metabolites with Nitric Oxide Inhibition from Marine-Derived Fungus Alternaria sp. 5102.

Chen Senhua S Deng Yanlian Y Yan Chong C Wu Zhenger Z Guo Heng H Liu Lan L Liu Hongju H

Marine drugs 20200814 8

Two new benzofurans, alternabenzofurans A and B (1 and 2) and two new sesquiterpenoids, alternaterpenoids A and B (3 and 4), along with 18 known polyketides (5-22), were isolated from the marine-derived fungus Alternaria sp. 5102. Their structures were elucidated on the basis of extensive spectroscopic analyses (1D and 2D NMR, HR-ESIMS, and ECD) and X-ray crystallography, as well as the modified Mosher's method. Compounds 2, 3, 5< ...[more]

PMID: 32823987

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