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.
Physiologically active marine natural products from Porifera. VIII. Agelasidines. Novel hypotaurocyamine derivatives from the Okinawan sea sponge Agelas nakamurai Hoshino