826-73-3
1-苯并环庚酮
→
7248-68-2
5,6-dihydro-4H-benzo[1,2]cyclohepta[6,7-b]furan-2,3-dione
553-90-2
草酸二甲酯
+
6742-32-1
2-(5-oxo-6,7,8,9-tetrahydrobenzo[7]annulen-6-yl)acetic acid