Showing structure for 3'-ethyl-12'-hydroxy-4'-methoxy-4-methyl-15'-(4-methyl-5-oxooxolan-2-yl)-13'-oxa-9',11'-diazaspiro[furan-2,2'-tetracyclo[7.4.2.0¹,¹⁰.0⁴,¹⁰]pentadecane]-5',11'-dien-5-one