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(2007/10/03)diethyl acetylmalonate
(E)-4-nitro-benzenediazo hydroxide; sodium-salt
4-nitrobenzenediazonium chloride
p-nitrobenzenediazonium
diethyl 1,3-acetonedicarboxylate
ethyl 2-((4-nitrophenyl)hydrazono)-3-oxobutanoate
5-methyl-2-(4-nitro-phenyl)-2H-pyrazole-3,4-dione-4-(4-nitro-phenylhydrazone)
[4-(4-nitro-phenylhydrazono)-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-3-yl]-acetic acid ethyl ester
2-(4-nitro-phenylhydrazono)-3-oxo-butyric acid
1-(4-nitro-phenyl)-4,6-dioxo-1,4,5,6-tetrahydro-pyridazine-3-carboxylic acid ethyl ester