trisodium 4-amino-3-[[4-[[4-[[4-[[2-(diethylamino)ethyl]amino]-2-hydroxyphenyl]azo]phenyl]amino]-3-sulphonatophenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate

4-Amino-3-[4-[4-[4-[2-(diethylamino)ethylamino]-2-hydroxyphenylazo]phenylamino]-3-(sodiosulfo)phenylazo]-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid disodium salt