Showing structure for (1r,2s,3r,5s,11s,13r,15r,17r,19s)-17-(furan-3-yl)-19-methyl-4,9,14,16-tetraoxahexacyclo[11.5.1.0¹,¹⁵.0²,¹¹.0³,⁵.0⁷,¹¹]nonadec-6-en-8-one