methyl 3-(6-formyl-1,3-benzodioxol-5-yl)propanoate

methyl 3-(1,3-benzodioxol-5-yl)propanoate

7,8-二氢萘并[2,3-d][1,3]二氧杂环戊烯-5(6H)-酮

4-(1,3-苯并二氧戊环-5-基)丁酸