124841-07-2 4-Oxo-4-(1,3,4-thiadiazol-2-ylamino)butanoic acid 2-((2-nitrophenyl)sulfonyl)hydrazide BRN 4216621 Butanoic acid, 4-oxo-4-(1,3,4-thiadiazol-2-ylamino)-, 2-((2-nitrophenyl)sulfonyl)hydrazide