4-(3,5-Dihydroxy-4-(3-(3-hydroxy-4-methoxyphenyl)-1-oxopropyl)phenoxy)butanoic acid monopotassium salt 62152-41-4 Butanoic acid, 4-(3,5-dihydroxy-4-(3-(3-hydroxy-4-methoxyphenyl)-1-oxopropyl)phenoxy)-, monopotassium salt