95896-18-7 BUTANOIC ACID, 4-OXO-4-((5-PROPYL-1,3,4-THIADIAZOL-2-YL)AMINO)-2-SULFO-, 1-METHY Butanoic acid, 4-oxo-4-((5-propyl-1,3,4-thiadiazol-2-yl)amino)-2-sulfo-, 1-methyl ester, monosodium salt