Showing structure for 18-(furan-3-yl)-4,9,9,19-tetramethyl-6,16-dioxo-5,17-dioxa-2-azapentacyclo[11.8.0.0³,¹¹.0⁴,⁸.0¹⁴,¹⁹]henicosa-1(13),2,11,14-tetraen-10-yl acetate