6-hydroxy-1,3-benzodioxole-5-carbaldehyde

[1,3]二氧杂环戊并[4,5-g]苯并吡喃-6-酮

(6-bromo-1,3-benzodioxol-5-yl) acetate

(6-nitro-1,3-benzodioxol-5-yl) benzoate