Showing structure for (2r,4s,10r,16r)-16-(furan-3-yl)-18-methyl-3,8,15-trioxapentacyclo[9.7.0.0²,⁴.0⁶,¹⁰.0¹³,¹⁷]octadeca-1(11),5,12,17-tetraene-7,14-dione