 Isoleucinopine ("N"-(1-carboxy-2-methylbutyl)glutamic acid or "N"-(1,3-dicarboxypropyl)isoleucine) was isolated from the poisonous mushroom "Clitocybe acromelalga".Leucinopine ("N"2-(D-1,3-dicarboxypropyl) derivative of leucine) is a member of the nopaline family isolated from crown gall tumors.Lysopine ("N"2-(D-1-carboxyethyl)-L-lysine) is a member of the octopine family found in crown gall tumors.