2,6,10,14,18,22-Hexaazapentacosanedioic acid,4,8,12,16,20,24-hexahydroxy-7,19-dimethyl-3,15-bis(1-methylethyl)-11,23-bis(2-methylpropyl)-5,9,13,17,21-pentaoxo-, 1-(1,1-dimethylethyl)25-(phenylmethyl) ester,(3S,4R,7S,8R,11S,12R,15S,16R,19S,20R,23S,24R)-