abstract |
Radioactive metallocene carboxylic acids and their derivates having formula (I), in which R?1, R2, R3, R4 and R5¿ have different meanings and M stands for a radioactive metal isotope of the elements having the atomic numbers 21-29, 31, 42-44, 49 or 57-83, are used for radioactively labelling NH-active compounds. Also disclosed is a process for labelling said compounds, as well as new metallocene carboxylic acid derivates having formula (I) in which M stands for a Cr-51, Mn52, Ru-97, Ru-103, Re-186, Re-188, and Ir-191 isotope. |