6527-68-0 Benzenesulfonic acid, 3,3'-(carbonyldiimino)bis[6-[(4-aminobenzoyl)amino]-, disodium salt Benzenesulfonic acid, 5,5'-ureylenebis[2-(p-aminobenzamido)-, disodium salt C.I. 36910 C.I. Direct Yellow 63 NSC71960 Pontamine Diazo Yellow 2GL