Naamines and naamidines, novel imidazole alkaloids from the calcareous sponge leucetta chagosensis

Abstract

The constitution of four new alkaloids (1–4) isolated from a Red Sea sponge, Leucettachagosensis Dendy, has been established by spectral methods. The compounds are substituted 2-amino imidazoles and substituted imidazolyl 2,4-dioxo-imidazolidinyl amines.