1,2-Bis(4-acetoxymethyl-3,5-dioxopiperazin-1-yl)ethane 2,6-Piperazinedione, 4,4'-(1,2-ethanediyl)bis(1-((acetyloxy)methyl)- 4,4'-(1,2-Ethanediyl)bis(1-((acetyloxy)methyl)-2,6-piperazinedione) 98631-87-9 ZSB 11