Butanoic acid, 4-chloro-, propyl ester

Butanoic acid, 4-chloro-3-oxo-, 1-methylethyl ester

Butanoic acid, 4-chloro-3-oxo-, methyl ester

Butanoic acid, 4-chloro-4-oxo-, ethyl ester

Butanoic acid, 4-chloro-4-oxo-, methyl ester

Butanoic acid, 4-cyano-2, 3, 5, 6-tetrachlorophenyl ester

Butanoic acid, 4-formylphenyl ester

Butanoic acid, 4-hydroxy-, 2-((4-(dimethylamino)phenyl)methyl)hydrazide

Butanoic acid, 4-hydroxy-, 2-(1-methylethyl)hydrazide

Butanoic acid, 4-hydroxy-, methyl ester

Butanoic acid, 4-mercapto-

Butanoic acid, 4-methoxy-3-oxo-, methyl ester

Butanoic acid, 4-oxo-2-sulfo-4-(1, 3, 4-thiadiazol-2-ylamino)-, monosodium salt

Butanoic acid, 4-oxo-4-((3-(pentadecyloxy)propyl)amino)sulfo-, sodium salt (1:2)

Butanoic acid, 4-oxo-4-((4-((2-pyrimidinylamino)sulfonyl)phenyl)amino)-, disilver(1+) salt

Butanoic acid, 4-oxo-4-((4-phenyl-2-thiazolyl)amino)-

Butanoic acid, 4-oxo-4-((5-propyl-1, 3, 4-thiadiazol-2-yl)amino)-, 2-(1-oxobutyl)hydrazide

Butanoic acid, 4-oxo-4-((5-propyl-1, 3, 4-thiadiazol-2-yl)amino)-, 2-(1-oxopropyl)hydrazide

Butanoic acid, 4-oxo-4-((5-propyl-1, 3, 4-thiadiazol-2-yl)amino)-, hydrazide

Butanoic acid, 4-oxo-4-((5-propyl-1, 3, 4-thiadiazol-2-yl)amino)-2-sulfo-, 1-methyl ester, monosodium salt