109880-39-9
6-羟甲基-4-甲氧基-2-吡啶甲酸甲酯
→
~77%
109880-40-2
methyl 6-formyl-4-methoxypyridine-2-carboxylate
138-60-3
4-氧代-1,4-二氢-2,6-吡啶二甲酸