Showing structure for (16r,21as)-1,10-dihydroxy-5,8,9-trimethyl-16-(prop-2-en-1-yl)-3,6-bis(sec-butyl)-3h,6h,9h,12h,13h,16h,19h,20h,21h,21ah-pyrrolo[1,2-d]1-oxa-4,7,10,13,16-pentaazacyclononadecane-4,7,14,17-tetrone