The invention is directed to a compound according to formula (1) wherein R2 is fluorine, X is nitrogen or carbon and R3 is an organic group. The invention is also directed to the use of this compound as a precursor for the preparation of a11C or18F-radio labelled compound. The radio labelled compound may be used in an in vivo diagnostic or imaging method.
                            该发明涉及一种化合物,其
化学式为(1),其中R2为
氟,X为氮或碳,R3为有机基团。该发明还涉及将该化合物用作制备a11C或18F标记化合物的前体的用途。这种放射性标记化合物可用于体内诊断或成像方法中。