Showing structure for 1-[5-(1,2,4a,5-tetramethyl-2,3,4,7,8,8a-hexahydronaphthalen-1-yl)-3-methylpent-2-en-1-yl] 3-[5-(2,5,5,8a-tetramethyl-1,4,4a,6,7,8-hexahydronaphthalen-1-yl)-3-methylpent-2-en-1-yl] propanedioate