Abstract: The invention relates to a technetium or rhenium complex of formula (I): [M (R1CS3)2L]??(I) in which M is Tc or Re, R1 represents an alkyl, cycloalkyl, aralkyl or aryl group which is unsubstituted or substituted by one or more substituents chosen from halogen atoms, the hydroxyl group, alkyl groups and alkoxy groups, and L is a dithiolate ligand, with the exception of the ligand of formula R2CS2 in which R2 is identical to R1. The dithiolate ligand is preferably a dithiocarbamate. The invention also relates to a radiopharmaceutical product comprising a complex of formula (I) with M representing 99Tc, 186Re or 188Re.

Abstract: The invention concerns radiopharmaceutical products suitable for the selective labeling of lymphomas containing a metal complex with the formula: [M(R1CS2)(R1CS3)2] in which M is chosen from among 99mTc, 186Re and 188Re, and R1 represents an alkyl, cycloalkyl, aralkyl or aryl group, optionally substituted, obtained by reaction of a pertechnetate or a perrhenate with a reducing agent such as SnCl2ZP2O in the presence of a dithiocarboxylate having the formula: (R1CS2)−Z2+.