Showing structure for (1r,2r,5s,6r,10r,13s,16s)-6-(furan-3-yl)-5,10,14,14-tetramethyl-15,19-dioxapentacyclo[11.7.0.0¹,¹⁶.0²,¹⁰.0⁵,⁹]icos-8-ene-11,18-dione