1,4-Bis(methylfurazanyl)piperazine N(sup 1),N(sup 4)-dioxide 150012-67-2 N,N'-Bis(3-methyl-2-oxo-1,2,5-oxadiazol-4-yl)piperazine Piperazine, 1,4-bis(methylfurazanyl)-, N(sup 1),N(sup 4)-dioxide