3-Hydroxy-3-(4-hydroxy-3-methoxyphenyl)propanoic acid 3-hydroxy-3-(4-hydroxy-3-methoxyphenyl)propanoicacid 3-Methoxy-4-hydroxyphenyl hydracrylic acid 3-Methyl-4-hydroxyphenylhydracrylic acid Benzenepropanoic acid, β,4-dihydroxy-3-methoxy- Hydracrylic acid, 3-(4-hydroxy-3-methoxyphenyl)- β,4-Dihydroxy-3-methoxybenzenepropanoic acid