2,2'-((R)-13-(((4R,7S,10S,13R,16S,19R)-10-(4-aminobutyl)-16-benzyl-4-(((2R,3R)-1,3-dihydroxybutan-2-yl)carbamoyl)-7-((R)-1-hydroxyethyl)-13-((1-nitroso-1H-indol-3-yl)methyl)-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentaazacycloicosan-19-yl)amino)-12-benzyl-1-carboxy-2-(carboxymethyl)-10,13-dioxo-2,5,8,11-tetraazatridecane-5,8-diyl)diacetic acid
