in the cord serum the range of concentrations , expressed as a percentage of the maternal serum concentration was : primidone ( 67-131 % ) , phenobarbitone ( 80-108 % ) , carbamazepine ( 60-76 % ) , phenytoin ( 95-162 % ) , ethosuximide ( 104 % ) , and valproic acid ( 125-147 % ) .
C0033148
primidone
C0031412
phenobarbitone