Nucleosides and nucleotides (nucleos(t)ides) have been in clinical use for almost 50 years and have become cornerstones of treatment for patients with viral infections or cancer. The approval of several additional drugs over the past decade demonstrates that this family still possesses strong potential. Therefore nucleos(t)ide are of great interest as promising chemotherapeutic agents, including: 2′-deoxy-L-uridine (CAS 31501-19-6), 2′-deoxy-D-uridine (CAS 951-78-0), telbivudine (CAS 3424-98-4), zidovudine (AZT, CAS 30516-87-1), trifluridine (CAS 70-00-8), clevudine (CAS 163252-36-6), PSI-6206 (CAS 863329-66-2), 2′-(S)-2′-chloro-2′-deoxy-2′-fluorouridine (CAS 1673560-41-2), ND06954 (CAS 114248-23-6), stavudine (CAS 3056-17-5), 5-ethynyltavudine (Festinavir, CAS 634907-30-5), torcitabine (CAS 40093-94-5), (−)-beta-D-(2R,4R)-dioxolane-thymine (DOT, 1-((2R,4R)-2-(hydroxymethyl)-1,3-dioxolan-4-yl)-5-methyl-2,4(1H,3H)-pyrimidinedione, CAS No. 127658-07-5), 2-(6-amino-purin-9-yl)-ethanol (CAS 707-99-3), 2′-C-methylcytidine (CAS 20724-73-6), PSI-6130 (CAS 817204-33-4), gemcitabine (CAS 95058-81-4), 2′-chloro-2′-deoxy-2′-fluorocytidine (CAS 1786426-19-4), 2′,2′-dichloro-2′-deoxycytidine (CAS 1703785-65-2), 2′-C-methylcytidine (CAS 20724-73-6), PSI-6130 (CAS 817204-33-4), lamivudine (3TC, CAS 134678-17-4), emtricitabine (CAS 143491-57-0), 2′-deoxyadenosine (CAS 958-09-8), 2′-deoxy-β-L-adenosine (CAS 14365-45-8), 2′-deoxy-4′-C-ethynyl-2-fluoroadenosine (CAS 865363-93-5), didanosine (CAS 69655-05-6), entecavir (CAS 209216-23-9), FMCA (CAS 1307273-70-6), dioxolane-G (DOG, CAS 145514-01-8), β-D-2′-deoxy-2′-(R)-fluoro-2′-β-C-methylguanosine (CAS No 817204-45-8), abacavir (ABC, CAS 136470-78-5), dioxolane-A (DOA, CAS #145514-02-9), [(2R,4R)-4-(6-cyclopropylamino-purin-9-yl)-[1,3]dioxolan-2-yl]-methanol (CAS 1446751-04-7), amdoxovir (AMDX, CAS 145514-04-1), (R)-1-(6-amino-purin-9-yl)-propan-2-ol (CAS 14047-28-0), and [(2S,5R)-5-(6-amino-purin-9-yl)-4-fluoro-2,5-dihydro-furan-2-yl]-methanol.Macroheterocyclic nucleoside derivative and its analog of the general formula 1 or general formula 2, a stereoisomer, isotope-enriched analog, pharmaceutically acceptable salt, hydrate, solvate, or crystalline or polymorphic form thereof,wherein:Ar is aryl or hetaryl;R1 and R2 are not necessarily the same substituents selected from H, F, Cl, CH3, OH;R3 is H or CH3;X is oxygen or ethanediyl-1,1 (C═CH2);Y is CH(R4)(CH2)k, CH(R4)(CH2)mC(O)O(CH2)n;R4 is H or CH3;k has a value from zero to six;m has a value from zero to two;n has a value of one to four;Q is a radical selected from Q1-Q4;wherein: R5 is the substituent selected from H, F, Cl, CH3, OH;the arrow (→) indicates the location, joined by Q1-Q4.