Showing structure for (1r,4s,5r,6s,7r,8r,11r,13s,17s,18s,19r)-4,5,7,8,17-pentahydroxy-6,18-dimethyl-3,10-dioxapentacyclo[9.8.0.0¹,⁷.0⁴,¹⁹.0¹³,¹⁸]nonadec-14-ene-9,16-dione