1-Propanesulfonic acid, 3-(3,5-dihydroxy-4-(3-(3-hydroxy-4-methoxyphenyl)-1-oxopropyl)phenoxy)-, calcium salt (2:1) 3-(3,5-Dihydroxy-4-(3-(3-hydroxy-4-methoxyphenyl)-1-oxopropyl)phenoxy)-1-propanesulfonic acid calcium salt (2:1) 61315-98-8