Showing structure for 7-(3,4-dihydroxybenzoyl)-11-(3-hydroxy-3-methylbut-1-en-1-yl)-4,4,10,10-tetramethyl-3,9-bis(3-methylbut-2-en-1-yl)-5-oxatricyclo[7.3.1.0¹,⁶]tridec-6-ene-8,13-dione