Abstract
A marine-derived actinomycete (Streptomyces sp. WBF16) exhibiting antitumor activities was investigated. The strain was identified using morphological, biochemical and genetic techniques. 16S rDNA sequence of the isolate indicated that it was most closely related to Streptomyces coelicolor A3 (2). Furthermore, a new aureolic acid (Chromomycin B, 1), along with Chromomycin A2 (2) and Chromomycin A3 (3) were isolated from its secondary metabolites. Their structures were determined by chemical and spectroscopic methods including 1D, 2D NMR and HRMS. Compounds 1–3 showed strong cytotoxicity against SGC7901, HepG2, A549, HCT116 and COC1 and HUVEC.
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