1,4-Bis(2,3-epoxypropyl)piperazine 2917-98-8 Diepoxypiperazine Diglycidyl piperazine Epoxypiperazine N,N'-Bis(2,3-epoxypropyl)piperazine NSC74437 Piperazine, 1,4-bis(2,3-epoxypropyl)- Piperazine, 1,4-bis(oxiranylmethyl)-