Showing structure for 5'-{[5-(hept-1-en-1-yl)-4,10-dihydroxy-9,9-dimethyl-2,8-dioxatricyclo[5.4.0.0?,?]undec-5-en-6-yl]methoxy}-4''-methyl-2-methylidene-5''-oxodispiro[bicyclo[3.1.1]heptane-6,4':2',2''-bis(oxolane)]-3-yl 3-hydroxy-2,2-dimethylbutanoate