4,4'-Bis[[1-(2-ethoxyphenylamino)-1,3-dioxobutan-2-yl]azo]-3,3'-dichloro-1,1'-biphenyl

2,2'-[[3,3'-Dichloro[1,1'-biphenyl]-4,4'-diyl]bis(azo)]bis[N-(2-ethoxyphenyl)-3-oxobutanamide]

2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(2-ethoxyphenyl)-3-oxobutyramide]