comparative effects of four barbiturates , phenobarbital ( pb ) , amobarbital ( ab ) , sodium barbital ( nabb ) , and barbituric acid ( ba ) on the development of neoplasms in the intestinal tract and other organs were investigated in rats following initiation with methyl ( acetoxymethyl ) nitrosamine ( dmn-oac ) .
C0004745
barbiturates
C0002640
amobarbital