Rb. Kinnel et al., PALAUAMINE AND ITS CONGENERS - A FAMILY OF BIOACTIVE BISGUANIDINES FROM THE MARINE SPONGE STYLOTELLA-AURANTIUM, Journal of organic chemistry, 63(10), 1998, pp. 3281-3286
The strongly cytotoxic, antibiotic, and immunosuppressive palau'amine
was isolated from the Belau sponge Stylotella aurantium, along with le
ss active I-bromo and 4,5-dibromo derivatives. Three corresponding iso
meric compounds, all less active, were also isolated, and full details
of the isolation and all structure proofs are provided.