Showing structure for (1s,2s,3s,4s,5r,7s,9s,14s,16s,18r)-2,4,7,10-tetrahydroxy-1,7,9,16-tetramethyl-13,17-dioxapentacyclo[9.5.2.0³,¹⁴.0⁵,¹⁸.0¹⁴,¹⁸]octadec-10-ene-6,12-dione