499-78-5
5-羟基-4-氧-4H-2-羧酸
+
74-89-5
甲胺
→
~20%
70113-54-1
5-hydroxy-1-methyl-4-oxopyridine-2-carboxylic acid
497-58-5
3,4-Dioxo-3,4-dihydro-2H-pyran-2,6-dicarbonsaeure
7732-18-5
水