123-25-1
丁二酸二乙酯
→
25370-46-1
ethyl 4-oxo-4-pyridin-4-ylbutanoate
1570-45-2
异烟酸乙酯
54109-96-5
diethyl 4-pyridylcarbonylsuccinate
55-22-1
异烟酸