title: Synthesis of guanosine and its derivatives from 5-amino-1-beta-D-ribofuranosyl-4-imidazolecarboxamide. II. Ring closure with sodium methylxanthate.
mesh_terms: D000577:Amides; D002254:Carbonates; D005663:Furans; D007093:Imidazoles; D009705:Nucleosides / Q000138:chemical synthesis*; D012266:Ribose; D013438:Sulfhydryl Compounds
chemical_list: D000577:Amides; D002254:Carbonates; D005663:Furans; D007093:Imidazoles; D009705:Nucleosides; D013438:Sulfhydryl Compounds; D012266:Ribose