4-(4-Hydroxyethylpiperazinyl)-7-nitrobenzofuroxan 61785-54-4 7-(4-(2-Hydroxyethyl)-1-piperazinyl)-4-nitrobenzofurazan 1-oxide B2743 BENZOFURAZAN, 7-(4-(2-HYDROXYETHYL)-1-PIPERAZINYL)-4-NITRO-, 1-OXIDE