(2S)-2-acetolactate <=> 3-hydroxy-3-methyl-2-oxobutanoate
(2s)-2-acetolactate <=> 3-hydroxy-3-methyl-2-oxobutanoate
(2S)-2-acetolactate <=> 3-hydroxy-3-methyl-2-oxobutanoate
(2s)-2-acetolactate <=> 3-hydroxy-3-methyl-2-oxobutanoate