“…Nucleoside analogs represent a potentially important class of antiviral anticancer agents [ 1 , 2 , 3 , 4 , 5 ] with antimicrobial and cholinesterase inhibitory activities [ 6 , 7 , 8 , 9 , 10 ] and are commonly used to treat hepatitis B virus [ 11 , 12 ], hepatitis C virus [ 13 , 14 ], herpes simplex [ 15 , 16 ], Human Immunodeficiency Virus (HIV) and neoplasms [ 17 , 18 ]. Zalcitabine (2′,3′-dideoxycytidine, ddc), Abacavir, Stavudine (2′,3′-didehydro-2′,3′-didehydro-2′,3′-dideoxythymidine, d4T), Didanosine (2′,3′-dideoxyinosine, ddI), Emtricitabine (FTC) and Zidovudine (azidothymidine, AZT) ( Figure 1 ) are among the essential antiretroviral nucleoside analogue reverse transcriptase inhibitors (NRTIs) that are used to treat HIV/Acquired Immune Deficiency Syndrome (AIDS) infections [ 19 ].…”