4-((5-Ethyl-1,3,4-thiadiazol-2-yl)amino)-4-oxo-2-sulfobutanoic acid sodium salt 95896-13-2 BUTANOIC ACID, 4-((5-ETHYL-1,3,4-THIADIAZOL-2-YL)AMINO)-4-OXO-2-SULFO-, MONOSODI Butanoic acid, 4-((5-ethyl-1,3,4-thiadiazol-2-yl)amino)-4-oxo-2-sulfo-, monosodium salt