Showing structure for 10-{[2,2-dimethyl-7,10-bis(2-methylbut-3-en-2-yl)-8-oxopyrano[3,2-g]chromen-5-yl]oxy}-8,8-dimethyl-3-(2-methylbut-3-en-2-yl)-5-[(2-methylbut-3-en-2-yl)oxy]pyrano[3,2-g]chromen-2-one