suramin , ribavirin , ammonium 21-tungsten-9-antimoniate ( hpa-23 ) , foscarnet ( phosphonoformate , pfa ) , inosine pranobex ( isoprinosine ) , peptide t , ampligen , al 721 , dideoxycytidine , and zidovudine ( formerly azidothymidine ) have antiretroviral activity in vitro .
C0022230
inosine
C0795760
isoprinosine