A new inositol-hopanoid from an Indonesia specimen of the sponge Plakortis simplex

The Caribbean sponge Plakortis simplex has been extensively studied by our group, and a large variety of unusual glycolipids and other amphiphilic compounds have been isolated, including simplexide, discoside, and 12-methylbacteriohopanetetrol .Recently, we had occasion to analyze for glycolipids an Indonesian specimen of P. simplex. In spite of the geographical distance, we found that the glycolipids composition of the Indonesian and Caribbean specimens were very similar. However, the Indonesian P. simplex also contained a new glycolipid, combining structural features of hopanoids and discoside, whose structure elucidation will be described