ethyl 6-[(2-methylpropan-2-yl)oxycarbonylamino]pyridine-2-carboxylate

6-(N,N-bis(tert-butyloxycarbonyl)amino)picolinic acid ethyl ester

6-[[(1,1-二甲基乙氧基)羰基]氨基]-2吡啶羧酸甲酯

2,6-吡啶二羧酸单乙酯

6-氨基-2-吡啶甲酸