T. Amagata et al., Dankasterone, a new class of cytotoxic steroid produced by a Gymnascella species from a marine sponge, CHEM COMMUN, (14), 1999, pp. 1321-1322
Dankasterone, produced by a strain of Gymnascella dankaliensis from the mar
ine sponge Halichondria japonica, is a novel class of steroid with signific
ant cytotoxicity against tumour cells in culture.