Three new alkaloids, convolutamines F and G, and convolutamydine E, from the Floridian marine bryozoan Amathia convoluta

Two new (2-phenylethyl)amine alkaloids, convolutamines F and G, and a dibromohydroxyoxindole alkaloid, convolutamydine E, have been isolated from the butan-1-ol soluble material of the Floridian marine bryozoan Amathia convoluta . Their structures were elucidated on the basis of spectroscopic data. Convolutamine F exhibited activity against KB, KB/VJ-300, and U937 cells. This compound also exhibited the inhibitory effects for cell division of fertilized sea urchin eggs.