2-((4S,7S,10S,13S,15R)-10-benzyl-15-hydroxy-7,13-diisobutyl-15-methyl-1-morpholino-2,5,8,11,14,18-hexaoxo-4-phenethyl-17-oxa-3,6,9,12-tetraazanonadecan-19-yl)-2-hydroxysuccinic acid