p. 305 - 309
(2007/10/02)ethyl p-nitrobenzoylazocarboxylate
N-(2-Morpholin-4-yl-6-oxo-cyclohex-1-enyl)-N'-(4-nitro-benzoyl)-hydrazinecarboxylic acid ethyl ester
N'-Benzoyl-N-(2-morpholin-4-yl-6-oxo-cyclohex-1-enyl)-hydrazinecarboxylic acid ethyl ester
N-(6-oxo-2-morpholin-4-yl-cyclohex-1-enyl)-hydrazine-N,N'-dicarboxylic acid diethyl ester