Abstract
A new pluramycin-class polyketide, rausuquinone (1), and its known congener hydramycin (2) were isolated from the culture extract of the deep-sea water-derived Rhodococcus sp. RD015140. Compound 1 possesses a γ-pyrone-fused anthraquinone core with a 3-butene-1,2-diol side chain. Structures of 1 was determined by extensive analysis of 1D and 2D NMR spectroscopic data. Compound 1 showed antimicrobial activity against Gram-positive bacteria. This is the first discovery of aromatic polyketides from the genus Rhodococcus.
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