excessive excretion of beta-alanine and of 3-hydroxypropionic , r- and s-3-aminoisobutyric , r- and s-3-hydroxyisobutyric and s-2- ( hydroxymethyl ) butyric acids probably due to a defect in the metabolism of the corresponding malonic semialdehydes .
C0221102
excretion
C0025519
metabolism