2-Amino-4-(3,5-dihydroxy-4-(3-(3-hydroxy-4-methoxyphenyl)-1-oxopropyl)phenoxy)butanoic acid 70412-91-8 Butanoic acid, 2-amino-4-(3,5-dihydroxy-4-(3-(3-hydroxy-4-methoxyphenyl)-1-oxopropyl)phenoxy)-