Showing structure for (1r,2r,5r,7r,8r,9s,10r,11r)-7-hydroxy-11-methyl-6-methylidene-16-oxo-15-oxapentacyclo[9.3.2.1⁵,⁸.0¹,¹⁰.0²,⁸]heptadecane-9-carboxylic acid