Showing structure for 1-[(12s)-18-acetyl-13-methyl-5,7-dioxa-13-azapentacyclo[10.7.1.0²,¹⁰.0⁴,⁸.0¹⁶,²⁰]icosa-1(19),2,4(8),9,16(20),17-hexaen-19-yl]ethanone