4-Chloropyridine-2-carboxylic acid
4-Nitropyridine-2-carboxylic acid
4-Hydroxypyridine-2-carboxylic acid
4-Bromopyridine-2-carboxylic acid
4-Phenylpyridine-2-carboxylic acid
5-Methylpyridine-2-carboxylic acid
5-Sulfopyridine-2-carboxylic acid
DBH [dopamine ß-hydroxylase] inhibitor