16199-47-6
→
~39%
5202-32-4
trimethyl 5-methoxyfuran-2,3,4-tricarboxylate
146678-98-0
methyl 4,6,8-trimethylazulene-2-carboxylate
+
762-42-5
丁炔二酸二甲酯
146679-00-7