6-bibromine norcatharidin was prepared. Then a simple and rapid method was described for the labelling of the compound with 125I. The radiolabelling yield was 95.3% at T= 60℃
t = 40min and pH= 5. In vivo distribution of 125I- N-amino-5
6-bibromine norcatharidin in the mouse showed a higher uptake in the lung