5-Carbomylbarbituric acid
2-Fluoro-6-phenylpyridine-3-carboxylic acid
2-Amino-3-ethoxypyridine
6-Amino-5-nitropyridine-3-sulfonic acid
N-Butyl-N-ethyl-2,5-dimethyl-7-(2,4,6-trimethylphenyl)- 7H-pyrrolo[2,3-d]pyrimidin-4-amine hydrochloride
4-Amino-5-iodo-2-phenylpyridine
2,3,6-Trifluoro-4-methoxypyridine
PGP-4008
inhibits P-glycoprotein