Norsesterterpene peroxides from the sponge Latrunculia sp
摘要:
A specimen of the sponge Latrunculia sp. from Jervis Bay, Australia, contained three new norsesterterpene peroxides, trunculin C methyl ester (3), trunculin D methyl ester (4), and trunculin E (5). The structure of trunculin C methyl ester (3) was determined by X-ray analysis, and the absolute configuration was established by application of the Horeau method to the diol 7. The structures of trunculin D methyl ester (4) and trunculin E (5) were elucidated by interpretation of spectral data, by chemical interconversion, and by using a biosynthetic hypothesis. Trunculin C methyl ester (3) and trunculin D methyl ester (4) have a novel carbon skeleton.