 Octopinic acid ("N"2-(D-1-carboxyethyl)-L-ornithine) is a member of the octopine family isolated from crown gall tumors.See "nopalinic acid"

Phenylalaninopine ("N"-(1-carboxy-2-phenylethyl)glutamic acid) was isolated from the poisonous mushroom "Clitocybe acromelalga".Rideopine ("N"-(4'-aminobutyl)-D-glutamic acid) is an opine-like molecule derived from putrescine.