serum concentrations of valproic acid ( vpa ) and its mono-unsaturated metabolites , 2-propyl-2-pentenoic acid ( 2-en ) , 2-propyl-3-pentenoic acid ( 3-en ) and 2-propyl-4-pentenoic acid ( 4-en ) , were measured in 36 epileptic patients .
C0042291
valproic acid
C0014544
epileptic