Expected for their ability to inhibit HIV replication, four heterodimers with a Nucleoside Reverse Transcriptase Inhibitor (NRTI) and a Non-Nucleoside Reverse Transcriptase Inhibitor (NNRTI) bound by a linker arm were designed and synthesized. For the NRTIs, d4U, d2U, d4T and 5'-O-acetyl-5-(3-hydroxypropynyl)d2U were chosen. For the NNRTI, a Trovirdine Analogue (belonging to the phenethylthiazolylthiourea class) was chosen. The conjugation of the two different inhibitors (NRTI and NNRTI) was performed using the succinyl-glycine moiety as a spontaneously cleavable linker.
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