Diterpene metabolites from two chemotypes of the marine sponge Myrmekioderma styx.
Sennett SH, Pomponi SA, Wright AE.
Three apparent chemotypes of the marine sponge Myrmekioderma styx exist. An acyclic diterpene, styxenol A [1], has been isolated from the shallow water chemotype, while three tricarbocyclic diterpenes 3, 6, and 7 have been isolated from the deep chemotype. The structures were elucidated based on spectral methods including homo- and hetero-nuclear 2D nmr experiments. Compounds 1, 3, and 6 exhibit moderate cytotoxicity against the P-388 murine leukemia cell line and the A549 human lung tumor cell line.