Showing structure for (7S,10S,14S,17S,19aS,25aS)-17-(2-hydroxybutan-2-yl)-5,9,16,19,25-pentaoxodocosahydro-1H,16H-10,14-methanopyrido[2,1-f]pyrrolo[2,1-i][1]oxa[4,7,10,14,17]pentaazacycloicosine-7-carboxylic acid