Showing structure for (1r,12s,13r,16r)-5,7-dihydroxy-15,15-dimethyl-13-(3-methylbut-2-en-1-yl)-4-(2-methylbut-3-en-2-yl)-2,14-dioxapentacyclo[11.4.1.0¹,¹⁰.0³,⁸.0¹²,¹⁶]octadeca-3(8),4,6,10-tetraene-9,18-dione