disodium 2-[4-[[2-cyano-3-[4-[methyl(2-sulphonatoethyl)amino]phenyl]-1-oxoallyl]amino]phenyl]-6-methylbenzothiazole-7-sulphonate

7-Benzothiazolesulfonic acid, 2-4-2-cyano-3-4-methyl(2-sulfoethyl)aminophenyl-1-oxo-2-propenylaminophenyl-6-methyl-, disodium salt

2-[4-[[2-Cyano-3-[4-[methyl(2-sulfoethyl)amino]phenyl]-1-oxo-2-propenyl]amino]phenyl]-6-methyl-7-benzothiazolesulfonic acid disodium salt