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(2007/10/03)diethyl 2-amino-5-(4-nitrophenyl)furan-3,4-dicarboxylate
ethyl 4-hydroxy-6-(4-nitrophenyl)furo[2,3-d]pyrimidine-5-carboxylate
4-hydroxy-6-(4-nitrophenyl)furo[2,3-d]pyrimidine-5-carboxylic acid
6-(4-nitrophenyl)furo[2,3-d]pyrimidin-4-ol
ethyl 2-chloro-3-(4-nitrophenyl)-3-oxopropanoate