4-(3,5-Dihydroxy-4-(3-(3-hydroxy-4-methoxyphenyl)-1-oxopropyl)phenoxy)-2-sulfobutanoic acid potassium salt 70412-92-9 Butanoic acid, 4-(3,5-dihydroxy-4-(3-(3-hydroxy-4-methoxyphenyl)-1-oxopropyl)phenoxy)-2-sulfo-, potassium salt