“…Two different types of anti-RT compounds have received the most attention: nucleoside analogues (Connolly & Hammer, 1992), such as AZT (zidovudinc) (Mitsuya et al, 1985), ddC (zalcitabine) and ddI (didanosine) (Mitsuya & Broder, 1986), and nonnucleoside compounds, such as 9-Cl-TIBO (Pauwels et al, 1990;Kukla et al, 1991;Debyser et al, 1991), HEPT derivatives (Miyasaka et al, 1989), nevirapine (Merluzzi et al, 1990;Hargrave et al, 1991;Hui et al, 1992), BHAP compounds (Romero et al, 1991), pyridinone compounds Saari et al, 1991), quinoline analogues (Althaus et al, 1993a), and phenethylthiazole thiourea (PETT) compounds (Ternansky et al, 1993;Ahgren et al, 1995;Cantrell et al, 1996). However, the clinical utility of many of these compounds has been hampered by toxicity and limited overall clinical efficacy (Sandstrom & Oberg, 1993a,b).…”