Disclosed is a series of N-deacetylthiocolchicine derivatives of formula I in which: the linker is a bivalent straight or branched C1-C8 alkyl residue, C3-C8 cycloalkyl, a phenylene or heterocyclic C4-C6 ring the G1 and G2 junctions, which can be the same or different, are -CO-, -CONH-, -CR2- groups in which R2 is hydrogen or a straight C1-C4 alkyl residue, or the G1-linker-G2 group is the -CO- group. The compounds of formula I have antiproliferative, antiinflammatory, antiarthritic and antiviral activity.
