Ethylmalonic acid601-75-2100 % similar 2-Ethylbutanoic acid88-09-564 % similar 2-Methylbutanoic acid116-53-058 % similar (+)-2-Methylbutanoic acid1730-91-258 % similar (S)-2-Hydroxybutyric acid3347-90-858 % similar 2-Methylbutanoic acid600-07-758 % similar (+)-α-Aminobutyric acid1492-24-656 % similar D-α-Aminobutyric acid2623-91-856 % similar α-Aminobutyric acid2835-81-656 % similar 2-Chlorobutanoic acid4170-24-556 % similar 2-Bromobutyric acid80-58-056 % similar α-Aminobutyric acid80-60-456 % similar Butylmalonic acid534-59-854 % similar 2-Hexadecylpropanedioic acid4371-64-650 % similar Isobutyric acid79-31-250 % similar 2-Ethylhexanoic acid149-57-548 % similar L-Alloisoleucine1509-34-848 % similar D-Alloisoleucine1509-35-948 % similar D-Isoleucine319-78-848 % similar Dl-isoleucine443-79-848 % similar