sodium m-[5-(3-ethyl-4-oxo-2-thioxo-5-thiazolidinylidene)-4-methyl-2-thioxo-1,3,4-thiadiazolidin-3-yl]benzenesulphonate

3-[5-(3-Ethyl-4-oxo-2-thioxothiazolidin-5-ylidene)-4-methyl-2-thioxo-1,3,4-thiadiazolidin-3-yl]benzenesulfonic acid sodium salt