- New inhibitors of the thioredoxin-thioredoxin reductase system based on a naphthoquinone spiroketal natural product lead. Wipf, P., Hopkins, T.D., Jung, J.K., Rodriguez, S., Birmingham, A., Southwick, E.C., Lazo, J.S., Powis, G. Bioorg. Med. Chem. Lett. (2001)