2-[4-[(1,3-dioxo-3-phenylpropyl)amino]phenyl]-1-octadecyl-1H-benzimidazole-5-sulphonate

2-[4-[(1,3-Dioxo-3-phenylpropyl)amino]phenyl]-1-octadecyl-1H-benzimidazole-5-sulfonic acid sodium salt