Showing structure for (1r,5s,6r,7r,8r,11r,16s,17s,18r)-5,7,8,16,17-pentahydroxy-6,14,18-trimethyl-3,10-dioxapentacyclo[9.8.0.0¹,⁷.0⁵,¹⁹.0¹³,¹⁸]nonadec-13-ene-4,9-dione