Butanoic acid, 1-ethyl-1, 4-dimethylhexyl ester

Butanoic acid, 1-methyl-1H-indol-3-yl ester

Butanoic acid, 2(or 3)-hydroxy-4-oxo-

Butanoic acid, 2(or 3)-methyl-, 2, 4-hexadien-1-yl ester

Butanoic acid, 2(or 3)-methyl-, cyclohexyl ester

Butanoic acid, 2, 2'-((2, 3, 5, 6-tetraiodo-1, 4-phenylene)bis(carbonylimino)methylene))bis-

Butanoic acid, 2, 2, 3, 3, 4, 4, 4-heptafluoro-, ethyl ester

Butanoic acid, 2, 2, 3, 3, 4, 4, 4-heptafluoro-, sodium salt (1:1)

Butanoic acid, 2, 2-4ichloro-, methyl ester

Butanoic acid, 2, 2-dichloro-, sodium salt

Butanoic acid, 2, 2-dihydroxy-3, 3, 4, 4, 4-pentafluoro-, compd. with diethylamine

Butanoic acid, 2, 3, 3-trimethyl-, (3-phenoxyphenyl)methyl ester

Butanoic acid, 2, 3, 4-trihydroxy-, (R*, R*)-

Butanoic acid, 2, 3-dihydroxy-2-(1-methylethyl)-, (2, 3, 5, 7a-tetrahydro-1H-pyrrolizin-7-yl)methyl ester, hydrochloride, (7aS-(7(2R*, 3S*), 7aR*))-

Butanoic acid, 2, 4-diamino-, hydrochloride (1:2)

Butanoic acid, 2, 4-dibromo-, ethyl ester

Butanoic acid, 2, 4-dihydroxy-3, 3-dimethyl-, (R)-, 2-((4-(dimethylamino)phenyl)methyl)hydrazide

Butanoic acid, 2, 4-dihydroxy-3, 3-dimethyl-, monosodium salt

Butanoic acid, 2, 4-dinitrophenyl ester

Butanoic acid, 2, 4-hexadien-1-yl ester