193690-66-3
2,3-dimethyl-4-methoxycarbonylaminopyridine
→
193690-68-5
2,3-dimethyl-4-methylamino-5-nitropyridine
193690-71-0
丁基,1-(乙酰基氨基)-4-氨基-1-羧基-4-羰基- (9CI)