5,6-二羟基-1,3-苯并间二氧杂环戊烯

[1,3]二氧杂环戊并[4,5-g]苯并吡喃-6-酮

(E)-3-(6-hydroxybenzo(1,3)dioxo-5-yl)-acrylic acid ethyl ester

5-溴-6-甲基-1,3-苯并二氧戊环

6-甲氧基-1,3-苯并二氧-5-甲醛