Showing structure for 16-benzyl-8-hydroxy-10,13-diisopropyl-2,7,12-trimethyl-6-(pent-4-yn-1-yl)-3-(sec-butyl)-3h,6h,7h,10h,13h,16h,19h,20h,21h,21ah-pyrrolo[2,1-f]1,10-dioxa-4,7,13,16-tetraazacyclononadecane-1,4,11,14,17-pentone