64-17-5
乙醇
+
725-92-8
diethyl 4-oxopyran-2,6-dicarboxylate
→
854696-67-6
4-hydroxy-tetrahydro-pyran-2,6-dicarboxylic acid diethyl ester
61417-25-2
diethyl 4-oxooxane-2,6-dicarboxylate