Four Novel Diterpenoids, Including Nakamurol A with a Unique Thelepogane Skeleton, from the Marine Sponge Agelas nakamurai

Four Novel Diterpenoids, Including Nakamurol A with a Unique Thelepogane Skeleton, from the Marine Sponge <i>Agelas nakamurai</i> Structures of Agelasines, Diterpenes Having a 9-Methyladeninium Chromophore Isolated from the Okinawan Marine Sponge <i>Agelas nakamurai</i> Hoshino Agelamasines A and B, diterpene alkaloids from an Okinawan marine sponge Agelas sp. New Alkaloids from the Papua New Guinean Sponge <i>Agelas nakamurai</i> New Alkaloids from the Papua New Guinean Sponge <i>Agelas nakamurai</i> Mukanadins A−C, New Bromopyrrole Alkaloids from Marine Sponge <i>Agelas </i><i>n</i><i>akamurai</i> Mukanadins A−C, New Bromopyrrole Alkaloids from Marine Sponge Agelas nakamurai Physiologically active marine natural products from Porifera. VIII. Agelasidines. Novel hypotaurocyamine derivatives from the Okinawan sea sponge Agelas nakamurai Hoshino Pyrrole Derivatives and Diterpene Alkaloids from the South China Sea Sponge Agelas nakamurai New Bromopyrrole Alkaloids from the Indopacific Sponge <i>Agelas nakamurai</i>