the effects of primidone ( 1.0 mm ) , phenobarbital ( 0.2 mm ) and phenylethylmalonamide ( pema ) ( 1.0 mm ) on nerve-stimulated transmitter release ( quantal content ) were determined for extracellular ca++ concentrations ( [ ca++ ] 0 ) from 0.4 to 0.8 mm at 1.0 hz nerve stimulation frequency .
C0033148
primidone
C0031412
phenobarbital