Showing structure for 5-(1,2,4a,5-tetramethyl-2,3,4,7,8,8a-hexahydronaphthalen-1-yl)-3-({3-[2-(1,2,4a,5-tetramethyl-2,3,4,7,8,8a-hexahydronaphthalen-1-yl)ethylidene]-2,5-dioxopyrrolidin-1-yl}methylidene)pentanoic acid