the tracers 6- [ 18f ] fluoro-l-3,4-dihydroxyphenylalanine ( 6- [ 18f ] fluoro-l-dopa ) and l- [ 14c ] dopa were injected simultaneously into rhesus monkeys , and the time course of their metabolites was measured in the striatum and in the occipital and frontal cortices .
C0023570
l-dopa
C0013023
dopa