5-[[5-(benzoylamino)-2-[[2-[(4-ethoxy-3-sulphophenyl)hydrazono]-1-methylnonadecylidene]hydrazino]phenyl]sulphonyl]salicylic acid

5-[[5-(Benzoylamino)-2-[2-[2-[2-(4-ethoxy-3-sulfophenyl)hydrazono]-1-methylnonadecane-1-ylidene]hydrazino]phenyl]sulfonyl]-2-hydroxybenzoic acid