Showing structure for (1r,2r,4s,5r,8r,9s,10r,11r)-4-hydroxy-11-methyl-6-methylidene-12-oxo-13-oxapentacyclo[9.3.3.1⁵,⁸.0¹,¹⁰.0²,⁸]octadecane-9-carboxylic acid