9,12-Octadecadienoic acid (9Z,12Z)-, 1,1',1'',1'''-[(3,6-dioxo-2,5-piperazinediyl)bis(4,1-butanediylnitrilodi-2,1-ethanediyl)] ester
9,12-Octadecadienoic acid (9Z,12Z)-, 1,1',1'',1'''-[(3,6-dioxo-2,5-piperazinediyl)bis(4,1-butanediylnitrilodi-2,1-ethanediyl)] ester