Showing structure for (1r,2s,3s,4s,5r,6s,8r,11s,12r,15r)-5,6-dihydroxy-4-methyl-13-methylidene-9-oxo-10-oxapentacyclo[9.3.2.1¹,¹².0³,⁸.0⁸,¹⁵]heptadecane-2,4-dicarboxylic acid