Cycloshermilamine D, a new pyridoacridine from the marine tunicate cystodytes violatinctus.

A new alkaloid, cycloshermilamine D, was isolated from the marine tunicate Cystodytes violatinctus, and its structure (1), which is closely related to shermilamine D, was established mainly on the basis of NMR spectroscopic data.

Haliclorensin, a Novel Diamino Alkaloid from the Marine Sponge Haliclonatulearensis

Haliclorensin (1), a novel diamino alkaloid possessing an azacyclodecane ring, has been isolated from the sponge Haliclona tulearensis. Its structure was elucidated on the basis of spectroscopic data, as well as by comparison with gamma-amino azacycloalkanes.