Showing structure for 4-[11-hydroxy-10-(2-hydroxy-3-methylbut-3-en-1-yl)-16-methoxy-6,6,7,20,20-pentamethyl-13,17-dioxo-3,8,19-trioxahexacyclo[14.4.1.0²,¹⁴.0²,¹⁸.0⁴,¹².0⁵,⁹]henicosa-4(12),5(9),10,14-tetraen-18-yl]-2-methylbut-2-enoic acid