title: Unconventional nucleotide analogues. Part XIII. (2S,4S)-2-hydroxymethyl- and 2-carboxy-4-(purin-9-yl)pyrrolidines.
mesh_terms: D000225:Adenine / Q000031:analogs & derivatives; D000970:Antineoplastic Agents / Q000138:chemical synthesis; D006147:Guanine / Q000031:analogs & derivatives; D006900:Hydroxylation; D007042:Hypoxanthines / Q000138:chemical synthesis; D008745:Methylation; D011392:Proline / Q000031:analogs & derivatives; D011684:Purine Nucleosides / Q000138:chemical synthesis*; D011759:Pyrrolidines / Q000138:chemical synthesis*
chemical_list: D000970:Antineoplastic Agents; D007042:Hypoxanthines; D011684:Purine Nucleosides; D011759:Pyrrolidines; D006147:Guanine; D011392:Proline; D000225:Adenine