Novel diterpenes, agelasine-A, -B, -C, -D, -E, and -F were isolatedfrom the Okinawan marine sponge Agelas nakamurai Hoshino and their structures were established to be monocyclic and bicyclic diterpenes having a 9-methyladeniniumunit by spectral analyses and chemical transformations.
Agelasine-E and -F, novel monocyclic diterpenoids with 9-methyladeninium unit possessing inhibitory effects on Na,K-ATPase isolated from the Okinawan sea sponge Hoshino
Agelasine-E and -F, novel terpenoids with a 9-methyladeniniumunit have been isolatedfrom the orange colored seaspongeHoshino as Na,k-ATPase inhibitors and their structures and absolute configurations have been determined on the basis of spectral data and chemical conversions.