Diferulic acid

2-Carboxy-2,3-dihydro-5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-1H-indene-1-acetic acid

3-[3-[5-(2-carboxyethenyl)-2-hydroxy-3-methoxy-phenyl]-4-hydroxy-5-methoxy-phenyl]prop-2-enoic acid