The present invention relates to novel Dipyrrole Compounds, compositions comprising a Dipyrrole Compound, and methods useful for treating or preventing cancer or a neoplastic disorder comprising administering a Dipyrrole Compound. The compounds, compositions, and methods of the invention are also useful for inhibiting the growth of a cancer cell or neoplastic cell, treating or preventing a viral infection, or inhibiting the replication and/or infectivity of a virus. The invention also provides screening assays for compounds that can be used in combination with Dipyrrole Compounds for the treatment of cancer or neoplastic disease, inhibition of cancer cell growth, or treatment of viral infections.