- Castanospermine and other plant alkaloid inhibitors of glucosidase activity block the growth of HIV. Tyms, A.S., Berrie, E.M., Ryder, T.A., Nash, R.J., Hegarty, M.P., Taylor, D.L., Mobberley, M.A., Davis, J.M., Bell, E.A., Jeffries, D.J. Lancet (1987)