Sponge is one of the marine species that has a high bioactivity and contains secondary metabobolite compound which can be used as antibiotic and medicine. Terpenoid compound derivatives have been successfully isolated from sponge Callyspongia pseudoretilulata by a method in which the n-hexane extract weighing 11. 28 g was fractionated using vacuum column chromatography with a non-pola... https://pyrodresoners.shop/product-category/electronic-speed-controllers/