5,7-dimethoxy-2-oxochromene-3-carboxylic acid

ethyl 3-amino-2-(2-cyanoacetyl)but-2-enoate

N-[5-Bromo-2-chloro-4-(ethylamino)-3-pyridinyl]-2-cyanoacetamide

2-Cyano-N-(pyridin-2-ylmethyl)acetamide

2-piperidin-2-ylacetonitrile