32804-69-6
2,3-Pentadien-dicarbonsaeure-monomethylester
→
32804-68-5
penta-2,3-dienedioic acid
54620-70-1
5-hydroxy-pent-2-ynoic acid
6950-82-9
7-羟基香豆素-4-乙酸
1712-36-3
dimethyl penta-2,3-dienedioate