Agelasine-A, -B, -C and -D, novel bicyclic diterpenoids with a 9-methyladeninium unit possessing inhibitory effects on na,K-atpase from the okinawa sea sponge sp.1)
Agelasine-A, -B, -C and -D, novel bicyclic diterpenoids having inhibitoryeffects on enzymic reactions of Na,K-ATPase, have been isolatedfrom the orange colored Okinawanseasponge Agelas sp. and the structures have been determined on the basis of their spectral data and chemical conversions.