Showing structure for (18s,19r)-13,16,17-trihydroxy-14,14,18-trimethyl-9-oxo-4,10-dioxapentacyclo[9.7.1.0³,⁷.0⁸,¹⁹.0¹³,¹⁸]nonadeca-3(7),5-dien-12-yl acetate