Showing structure for 17-hydroxy-6-(2-hydroxy-5-oxo-2h-furan-3-yl)-7,11,15,15-tetramethyl-3-oxapentacyclo[8.8.0.0²,⁴.0²,⁷.0¹¹,¹⁶]octadeca-12,16-diene-14,18-dione