(E)-7-hydroxy-6-[3-(4-hydroxy-3-methoxyphenyl)acryloyl]-4-methyl-2H-chromen-2-one

(E)-7-hydroxy-4-methyl-6-[3-(2,3,4-trimethoxyphenyl)acryloyl]-2H-chromen-2-one

(E)-7-hydroxy-4-methyl-6-[3-(2,4,6-trimethoxyphenyl)acryloyl]-2H-chromen-2-one

(E)-7-hydroxy-4-methyl-6-[3-(2,4,5-trimethoxyphenyl)acryloyl]-2H-chromen-2-one

(E)-8-(3-hydroxy-4-methoxyphenyl)-4-methyl-7,8-dihydropyrano[3,2-g]chromene-2,6-dione