3,3'-((4R,7S,10S,13S,16S,19R,22R,25S,28S,31S,34S,37R)-7,34-Bis(2-amino-2-oxoethyl)-4-(2-((S)-1-(((S)-1-((2-amino-2-oxoethyl)amino)-4-methyl-1-oxopentan-2-yl)amino)pyrrolidin-2-yl)-2-oxoacetyl)-13,28-di((S)-sec-butyl)-37-(((S)-2-((S)-3-(2-hydrazinylacetamido)-5-methyl-2-oxohexanoyl)pyrrolidin-1-yl)amino)-16,25-bis(4-hydroxybenzyl)-19,22-bis(mercaptomethyl)-6,9,12,15,18,21,24,27,30,33,36-undecaoxo-1,2-dithia-5,8,11,14,17,20,23,26,29,32,35-undecaazacyclooctatriacontane-10,31-diyl)dipropanamide
