Showing structure for (5-{1-[2-(3h-imidazol-4-yl)ethyl]-2,5-dioxopyrrol-3-yl}-2-[2-(1,2,5,5-tetramethyl-2,3,4,4a,6,7-hexahydronaphthalen-1-yl)ethyl]pentyl)oxysulfonic acid