28281-84-7
6-(carboxymethyl)-1,3-benzodioxole-5-carboxylic acid
+
108-24-7
乙酸酐
→
78873-84-4
7-methyl-5-oxo-[1,3]dioxolo[4,5-g]isochromene-8-carboxylic acid
140116-56-9