Showing structure for (2r)-3-[(3s,6s,9s,16s,21as)-1,10-dihydroxy-3,6-diisopropyl-5,8,9-trimethyl-4,7,14,17-tetraoxo-3h,6h,9h,12h,13h,16h,19h,20h,21h,21ah-pyrrolo[1,2-d]1-oxa-4,7,10,13,16-pentaazacyclononadecan-16-yl]-2-methylpropanoic acid