Idramantone (Kemantane) is a biologically active compound first synthesized and pharmacologically studied at the V. V. Zakusov Science Research Institute of Pharmacology, Russian Academy of Medical Sciences. Idramantone has immunostimulatory properties, which are particularly effective in the treatment of autoimmune diseases of the vascular system of the limbs, chronic bronchitis, bronchial asthma, aphthous stomatitis, herpes, and others. Idramantone also has an antiparkinsonism action. The compound has antiamnestic properties, which experimental data indicate are comparable in strength to those of memantine. Idramantone has cerebrovascular properties, increasing the blood supply in the ischemic brain. In addition, Idramantone and its derivatives are used in the electronics industry.

Didox is a simple, synthetic antioxidant and a ribonucleotide reductase inhibitor with activity against retroviruses. Didox inhibits retrovirus replication by depleting the deoxynucleotides obligatory for the synthesis of the proviral DNA intermediate of retrovirus replication. It also increases the radiosensitivity of cancer cells by inhibition of ribonucleotide reductase, resulting in a reduction of BCL-2 mediated resistance to apoptosis. Didox has been found to reduce the levels of oxidative injury markers in the brains of HIV patients with dementia. Didox has been evaluated in various phase I and phase II trials but Didox did not demonstrate any efficacy response in patients.