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2,4-DIHYDROXYBENZALDEHYDE {2-[2-(2,4-DIHYDROXYBENZYLIDENE)-1-METHYLHYDRAZINO]ETHYL}(METHYL)HYDRAZONE 2,4-DIHYDROXYBENZALDEHYDE {2-[2-(2,4-DIHYDROXYBENZYLIDENE)-1-METHYLHYDRAZINO]ETHYL}(METHYL)HYDRAZONE