Five new pteridic acids C-G (1-5) were isolated from a culture broth of the marine-derived actinomycete Streptomyces sp. SCSGAA 0027. Their complete structures were elucidated on the basis of NMR data, modified Mosher's method and quantum chemical calculations. Furthermore, their cytotoxicity, antiviral and antimicrobial activities were also evaluated.

中文翻译：

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来自海洋来源的链霉菌sp的蝶形酸CG螺环聚酮化合物。SCSGAA 0027。

从海洋来源的放线菌链霉菌（Streptomyces sp。）的培养液中分离出五种新的蝶酸CG（1-5）。SCSGAA0027。根据NMR数据，改进的Mosher方法和量子化学计算，阐明了其完整结构。此外，还评估了它们的细胞毒性，抗病毒和抗微生物活性。