67-56-1
甲醇
+
201230-82-2
carbon monoxide
55580-08-0
7-溴-3,4-二氢-2H-苯并[B]氧杂环庚烷-5-酮
→
1116093-90-3
methyl 5-oxo-3,4-dihydro-2H-1-benzoxepine-7-carboxylate