50839-95-7
2-chloro-4-methyl-pyridine-3-carbonyl chloride
→
133627-30-2
11-ethyl-7-methyl-5H-dipyrido[2,3-d:2',3'-h][1,4]diazepin-6-one
6298-19-7
3-氨基-2-氯吡啶