Showing structure for 11-(3,7-dimethylocta-2,6-dien-1-yl)-4,4,8,8-tetramethyl-9-(2-methylpropanoyl)-3-(prop-1-en-2-yl)tetracyclo[7.3.1.1⁷,¹¹.0¹,⁵]tetradecane-10,12,13-trione