63881-51-6
ethyl 1,4-benzodioxine-3-carboxylate
→
~93%
67471-01-6
1,4-benzodioxine-3-carboxylic acid
169836-21-9
~85%
4739-94-0
1,4-苯并二氧六环-2-甲酸乙酯
65456-19-1
ethyl 2,3-dibromo-2,3-dihydro-1,4-benzodioxin-2-carboxylate