3-[3-(3,4-dihydroxyphenyl)prop-2-enoyl]chromen-2-one

4-甲氧基苯-1,2-二醇

3,4-二羟基扁桃腈

5-[(3,4-dihydroxyphenyl)methylidene]imidazolidine-2,4-dione

phenyl 3-(3,4-dihydroxyphenyl)prop-2-enoate