Eudistomin
Eudistomins are β-carboline derivatives , isolated from ascidians ( marine tunicates of the family "Ascidiacea" ) , like "Ritterella sigillinoides" , <ref name="doi10 . 1071/CH9891201"></ref> "Lissoclinum fragile" , <ref name="doi10 . 1021/np50106a016"></ref> or "Pseudodistoma aureum" . <ref name="doi10 . 1021/np9800452"></ref> 
<triplet> Ascidiacea <subj> tunicates <obj> parent taxon