121879-78-5 1H-Indazole, 3-(4-methyl-1-piperazinyl)-6-nitro-, monohydrochloride 3-(4-Methyl-1-piperazinyl)-6-nitro-1H-indazole monohydrochloride 3-(N-Methylpiperazino)-6-nitroindazol monohydrochlorid [German]