Abstract
A new polyene aldehyde, named amphonal (1), and two known (2 and 3) polyketides were isolated from the deep-sea-derived Streptomyces amphotericinicus OUCT16-38 strain. The structure of 1 was determined by extensive MS and NMR spectroscopic analysis. In the cytotoxicity evaluation, compound 2 showed significant growth inhibition against the drug-resistant human lung cancer cell line A549-Taxol with IC50 value of 0.44 μM, which was more potent than the positive control doxorubicin. Meanwhile, 2 showed considerable cytotoxic effect towards H1975, H1299 and HEL cell lines (IC50 = 0.93-4.73 μM) as well.
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