93772-12-4
3-(dimethylaminodiazenyl)pyridine-4-carboxylic acid
→
7129-66-0
4,5-didehydropyridine
626-55-1
3-溴吡啶
4664-08-8
吡啶-3,4-二羧酸酐
460-12-8
丁二炔
1070-71-9
丙炔腈
74-86-2
乙炔