Coomassie brilliant blue G

CCN (CC1=CC (=CC=C1) S (=O) (=O) [O-]) C2=CC (=C (C=C2) /C (=C/3\C=CC (=[N+] (CC) CC4=CC (=CC=C4) S (=O) (=O) [O-]) C=C3C) /C5=CC=C (C=C5) NC6=CC=C (C=C6) OCC) C.[Na+]