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