Isolation of 13 New Ritterazines from the Tunicate Ritterella tokioka and Chemical Transformation of Ritterazine B¹

Isolation of 13 New Ritterazines from the Tunicate <i>Ritterella tokioka</i> and Chemical Transformation of Ritterazine B¹ Ritterazine A, a highly cytotoxic dimeric steroidal alkaloid, from the tunicate Ritterella tokioka Ritterazine A, a highly cytotoxic dimeric steroidal alkaloid, from the tunicate Ritterella tokioka Ten more ritterazines, cytotoxic steroidal alkaloids from the tunicate Ritterella tokioka Isolation and structure elucidation of ritterazines B and C, highly cytotoxic dimeric steroidal alkaloids, from the tunicate Ritterella tokioka Review of Cytotoxic Cephalostatins and Ritterazines: Isolation and Synthesis Review of Cytotoxic Cephalostatins and Ritterazines: Isolation and Synthesis On topography and functionality in the B-D rings of cephalostatin cytotoxins Cystodytins D-I, New Cytotoxic Tetracyclic Aromatic Alkaloids from the Okinawan Marine Tunicate Cystodytes dellechiajei Eudistomins From the New Zealand Ascidian Ritterella sigillinoides