Abstract
A new p-terphenyl derivative, hydroxystrepantibin D (1), was isolated along with two known p-terphenyls (2 and 3) from the culture broth of Phlebiopsis castanea. These compounds were isolated using silica gel column chromatography, reversed-phase medium-pressure liquid chromatography, Sephadex LH-20 column chromatography, and preparative HPLC. Their structures were determined based on spectroscopic methods. These compounds exhibited free radical scavenging activities with IC50 values in the range from 22.2 to 158.4 μM against 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical and in the range from 161.1 to 356.1 μM against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical.
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The authors thank Ms. Ji-Young Oh, Center for University-wide Research Facilities (CURF) at Jeonbuk National University for performing NMR measurements.
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Choi, DC., Ki, DW., Kim, JY. et al. p-Terphenyl glucosides from the culture broth of Phlebiopsis castanea. J Antibiot 76, 52–55 (2023). https://doi.org/10.1038/s41429-022-00579-7
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DOI: https://doi.org/10.1038/s41429-022-00579-7