7-furan-2-yl-2,4-dioxo-1,2,3,4-tetrahydro-pyrido[2,3-d]pyrimidine-5-carboxylic acid ethyl ester

1-(3-chloropyridin-2-yl)-5-(furan-2-yl)-1H-pyrazole-3-carboxylic acid

6-(2-furyl)-3-methylsulfanylthieno[2,3-e][1,2,4]triazine

4-[2]furyl-2-hydroxyimino-4-oxo-butyric acid ethyl ester

5-[2]furyl-1-phenyl-1H-pyrazole