Showing structure for (3s,6r,7s,10s,13s,16s,21as)-3-[(2r)-butan-2-yl]-13,16-bis[(2s)-butan-2-yl]-8-hydroxy-10-isopropyl-2,7,12-trimethyl-6-(pent-4-yn-1-yl)-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