disodium 1-[[4-[[(2,6-dimethyl-4-pyrimidinyl)amino]sulphonyl]phenyl]amino]-3-phenylpropane-1,3-disulphonate

1-[[4-[[(2,6-Dimethyl-4-pyrimidinyl)amino]sulfonyl]phenyl]amino]-3-phenyl-1,3-propanedisulfonic acid disodium salt