186581-53-3
重氮甲烷
+
51673-83-7
2-四氢吡喃甲酸
→
84355-44-2
四氢吡喃-2-甲酸甲酯
60900-13-2
n-butyl 3,6-dihydro-2H-pyran-2-carboxylate
16698-52-5
3,4-二氢吡喃2-羧酸钠
38426-33-4
2-carbomethoxy-3,6-dihydro-2H-pyran