186581-53-3
重氮甲烷
→
3420-58-4
1-(3-methoxyfuran-2-yl)ethanone
118-71-8
2-甲基-3-羟基-4-吡喃酮
63493-69-6
2,4-dimethoxy-6-methyl-2H-pyran-5-one