Showing structure for (2e)-6-[(1r,2s,5r,6s,9r,10r,13r)-15-hydroxy-9,10,14,14-tetramethyl-16-oxapentacyclo[13.2.2.0¹,¹³.0²,¹⁰.0⁵,⁹]nonadecan-6-yl]-2-methylhepta-2,6-dienoic acid