Three new secondary metabolites, amycofuran (1), amycocyclopiazonic acid (2), and amycolactam (3), were isolated from the sponge-associated rare actinomycete Amycolatopsis sp. Based on combined spectroscopic analyses, the structures of 1-3 were determined to be a new benzofuran glycoside and new indole alkaloids related to cyclopiazonic acids, a class that has previously only been reported in fungi. The absolute configurations of 1 and 3 were deduced by ECD calculations, whereas that of 2 was determined using the modified Mosher method. Amycolactam (3) displayed significant cytotoxicity against the gastric cancer cell line SNU638 and the colon cancer cell line HCT116. © 2014 by the authors; licensee MDPI.
Kwon, Y., Kim, S. H., Shin, Y., Bae, M., Kim, B. Y., Lee, S. K., … Oh, D. C. (2014). A new benzofuran glycoside and indole alkaloids from a sponge-associated rare actinomycete, Amycolatopsis sp. Marine Drugs, 12(4), 2326–2340. https://doi.org/10.3390/md12042326