1027089-61-7
→
76031-43-1
pyran-3,4-dione
+
15719-64-9
497-58-5
3,4-Dioxo-3,4-dihydro-2H-pyran-2,6-dicarbonsaeure
108-97-4
吡喃-4-酮
499-78-5
5-羟基-4-氧-4H-2-羧酸