873786-47-1

1,2-Pyrrolidinedicarboxylic acid,4-[4-[[2-[[4-[(4-aminophenyl)azo]phenyl]amino]-2-oxoethyl]amino]-4-oxobutyl]-5-oxo-, 1-(1,1-dimethylethyl) 2-ethyl ester, (2S,4R)-