Showing structure for (1r,2s,3s,5r,7s,11s,13r,15s,17r,19s)-17-(furan-3-yl)-19-methyl-4,9,14,16-tetraoxahexacyclo[11.5.1.0¹,¹⁵.0²,¹¹.0³,⁵.0⁷,¹¹]nonadecan-8-one