[diGly9]

(S) -2- (((S) -2- (2- ((3R,6S,9S,12S,15S) -6- (2-amino-2-oxoethyl) -9- (3-amino-3-oxopropyl) -12- ((S) -sec-butyl) -15- (4-methoxybenzyl) -5,8,11,14,17-pentaoxo-1-thia-4,7,10,13,16-pentaazacycloicosan-3-yl) -2-oxoacetyl) pyrrolidin-1-yl) amino) -N- (4-hydrazineyl-2,3-dioxobutyl) -4-methylpentanamide