1-Piperazineethanol, 4-(7-nitrobenzofurazan-4-yl)- 4-(4-(2-Hydroxyethyl)-1-piperazinyl)-7-nitrobenzofurazan 4-(7-Nitrobenzofurazan-4-yl)-1-piperazineethanol 61785-74-8 7-(2-Hydroxyethylpiperazinyl)-4-nitrobenzofurazan BFZ 21 Benzofurazan, 4-(4-(2-hydroxyethyl)-1-piperazinyl)-7-nitro-