3-Pyridinecarboxylic acid, 6-[1-[(1,1-dimethylethoxy)carbonyl]hydrazinyl]-
3-Pyridinecarboxylic acid, 6-[2-[(1,1-dimethylethoxy)carbonyl]hydrazino]-
6-[1-[(1,1-Dimethylethoxy)carbonyl]hydrazinyl]-3-pyridinecarboxylic acid
6-[2-(tert-Butoxycarbonyl)hydrazinyl]nicotinic acid
6-Boc-Hynic