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Novel styrylpyrones, phellinins A1 and A2, were isolated together with known styrylpyrone compounds, hispidin and 1,1-distyrylpyrylethan, from the cultured broth of Phellinus sp. KACC93057P. These compounds were purified by solvent partition, Sephadex LH-20 column chromatography, C(18)-solid phase extraction and finally by reversed-phase (ODS) TLC. To identify the phellinin producer Phellinus sp. KACC93057P, the ribosomal DNA (rDNA) internal transcribed space regions containing 5.8 rDNA were sequenced and compared with those of the known Phellinus isolates. Phellinus sp. KACC93057P was 94.8% identical to P. baumii and P. linteus, all of which did not produce phellinins A1 and A2. These compounds significantly scavenged free radicals such as 1,1-diphenyl-2-picrylhydrazyl, 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) and superoxide.

journal of antibiotics

Phellinins A1 and A2, new styrylpyrones from the culture broth of Phellinus sp. KACC93057P: I. Fermentation, taxonomy, isolation and biological properties