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2-HYDROXY-5-NITROBENZALDEHYDE {2-[(2E)-2-(2-HYDROXY-5-NITROBENZYLIDENE)-1-METHYLHYDRAZINO]ETHYL}(METHYL)HYDRAZONE 2-HYDROXY-5-NITROBENZALDEHYDE {2-[(2E)-2-(2-HYDROXY-5-NITROBENZYLIDENE)-1-METHYLHYDRAZINO]ETHYL}(METHYL)HYDRAZONE