| abstract |
A bioreductive conjugate comprises a bioreductive moiety with at least one therapeutic agent linked thereto and physiologically acceptable derivatives thereof. The bioreductive moiety incorporates an aromatic ring substituted with a nitro group and the conjugate is such that bioreduction of the nitro group causes release of the therapeutic agent by a through bond elimination and the residue of the bioreductive moiety to undergo an intramolecular cyclisation reaction in which the nitrogen of the original nitro group provides an atom of the thus formed ring. |