p. 2676 - 2678
(2010/03/03)2-tert-butylamino-5-(4-nitro-phenyl)-furan-3,4-dicarboxylic acid dimethyl ester
diethyl 1,4-bis(4-nitrophenyl)-1H-pyrrole-2,3-dicarboxylate
dimethyl 1,4-bis(4-nitrophenyl)-1H-pyrrole-2,3-dicarboxylate
di-tert-butyl 1,4-bis(4-nitrophenyl)-1H-pyrrole-2,3-dicarboxylate