Eudistomins From the New Zealand Ascidian Ritterella sigillinoides

Abstract

In addition to the previously reported antiviral and antitumour compounds eudistomin K (la)and eudistomin K sulfoxide (2a), debromoeudistomin K (3a), eudistomin C (4a), eudistomin O (5a) and β-carboline (5b) have now also been isolated from the New Zealand ascidian Ritterella sigillinoides. The in vitro biological activities of these compounds are compared.