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 G2junctions, which can be the same or different, are - CO-, -COHN-, -CR2- groupsin which R2 is hydrogen or a straight C1-C4 alkyl residue, or the G1-linker-G2group is the -CO- group. The compounds of formula (I) have antiproliferative,antinflammatory, antiarthritic and antiviral activity.