A novel negatively charged biomolecule-cordycepin has been intercalated within the gallery spaces of [Mg-Al-NO3]. Results of TEM, PXRD and FT-IR spectroscopy confirmed that cordycepin could be intercalated into [Mg-Al-NO3] interlayers as the charge-compensating species. Initial studies suggest that the new bioinorganic nanocomposite may be used as a novel inorganic reservoir or carrier of pharmaceutically active compounds. A novel negatively charged biomolecule-cordycepin has been intercalated within the gallery spaces of [Mg-Al-NO3]. Results of TEM, PXRD and FT-IR spectroscopy confirmed that cordycepin could be intercalated into [Mg-Al-NO3] interlayers as the charge-compensating species. Initial studies suggest that the new bioinorganic nanocomposite may be used as a novel inorganic reservoir or carrier of pharmaceutically active compounds.