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(2007/10/02)N-m-Nitrophenylchelidamic acid
4-(1-phenylpyridin-4(1H)-ylidene)-2-phenyl-1,3-oxazol-5(4H)-one
5-(1-phenyl-1H-pyridin-4-ylidene)-2-thioxo-thiazolidin-4-one
4-oxo-1-phenyl-1,4-dihydro-pyridine-2,6-dicarboxylic acid monoethyl ester
4-oxo-1-phenyl-1,4-dihydro-pyridine-2,6-dicarboxylic acid diethyl ester