4,4'-(Propane-1,2-diyl)bis(piperazine-2,6-dione)NSC 129943(±)-1,2-Bis(3,5-dioxopiperazinyl)propaneTepirone(±)-1,2-Bis(3,5-dioxopiperazin-1-yl)propaneICRF 159Razoxane1,2-Bis(3,5-dioxo-1-piperazinyl)propaneRazoxin4,4′-Propylenebis(2,6-piperazinedione)ICI 59118Troxozonerazoxane(+,-)-1,2-Bis(3,5-dioxopiperazine-1-yl)propane