553-90-2
草酸二甲酯
+
1422-26-0
9-Oxodecanoic acid
→
22935-41-7
7-[3-(2-methoxy-2-oxoacetyl)-2,4,5-trioxocyclopentyl]heptanoic acid
2104-19-0
壬二酸氢甲酯
22935-43-9
7-(3-hydroxy-2,5-dioxocyclopentyl)heptanoic acid