Rosemeyer, Helmut (March 2004). “The Chemodiversity of Purine as a Constituent of Natural Products”. 《Chemistry & Biodiversity》 1 (3): 361–401. doi:10.1002/cbdv.200490033. PMID17191854.
Fischer, Emil (1884). “Ueber die Harnsäure. I.” [On uric acid. I.]. 《Berichte der Deutschen Chemischen Gesellschaft》 17: 328–338. doi:10.1002/cber.18840170196. From p. 329: "Um eine rationelle Nomenklatur der so entstehenden zahlreichen Substanzen zu ermöglichen, betrachte ich dieselben als Abkömmlinge der noch unbekannten Wasserstoffverbindung CH3.C5N4H3 and nenne die letztere Methylpurin." (In order to make possible a rational nomenclature for the numerous existing substances, I regarded them as derivatives of a still unknown hydrogen compound, CH3.C5N4H3, and call the latter "methylpurine".)
Fischer, Emil (1898). “Ueber das Purin und seine Methylderivate” [On purine and its methyl derivatives]. 《Berichte der Deutschen Chemischen Gesellschaft》 31 (3): 2550–2574. doi:10.1002/cber.18980310304. From p. 2550: "…hielt ich es für zweckmäßig, alle diese Produkte ebenso wie die Harnsäure als Derivate der sauerstofffreien Verbindung C5H4N4 zu betrachten, und wählte für diese den Namen Purin, welcher aus den Wörtern purum und uricum kombiniert war." (…I regarded it as expedient to consider all of these products, just like uric acid, as derivatives of the oxygen-free compound C5H4N4, and chose for them the name "purine", which was formed from the [Latin] words purum and uricum.)
Davies, O.; Mendes, P.; Smallbone, K.; Malys, N. (2012). “Characterisation of multiple substrate-specific (d)ITP/(d)XTPase and modelling of deaminated purine nucleotide metabolism”. 《BMB Reports》 45 (4): 259–264. doi:10.5483/BMBRep.2012.45.4.259. PMID22531138.
Choi, Hyon K.; Atkinson, Karen; Karlson, Elizabeth W.; Willett, Walter; Curhan, Gary (2004). “Purine-Rich Foods, Dairy and Protein Intake, and the Risk of Gout in Men”. 《New England Journal of Medicine》 350 (11): 1093–1103. doi:10.1056/NEJMoa035700. PMID15014182.
Saladino, Raffaele; Crestini, Claudia; Ciciriello, Fabiana; Costanzo, Giovanna; Mauro, Ernesto; 외. (2006). “About a Formamide-Based Origin of Informational Polymers: Syntheses of Nucleobases and Favourable Thermodynamic Niches for Early Polymers”. 《Origins of Life and Evolution of Biospheres》 36 (5–6): 523–531. Bibcode:2006OLEB...36..523S. doi:10.1007/s11084-006-9053-2. PMID17136429.
Sanchez, R. A.; Ferris, J. P.; Orgel, L. E. (1967). “Studies in prebiotic synthesis. II. Synthesis of purine precursors and amino acids from aqueous hydrogen cyanide”. 《Journal of Molecular Biology》 30 (2): 223–253. doi:10.1016/S0022-2836(67)80037-8. PMID4297187.
Ferris, James P.; Orgel, L. E. (March 1966). “An Unusual Photochemical Rearrangement in the Synthesis of Adenine from Hydrogen Cyanide”. 《Journal of the American Chemical Society》 88 (5): 1074. doi:10.1021/ja00957a050.
Saladino, Raffaele; Crestini, Claudia; Ciciriello, Fabiana; Costanzo, Giovanna; Mauro, Ernesto; 외. (2006). “About a Formamide-Based Origin of Informational Polymers: Syntheses of Nucleobases and Favourable Thermodynamic Niches for Early Polymers”. 《Origins of Life and Evolution of Biospheres》 36 (5–6): 523–531. Bibcode:2006OLEB...36..523S. doi:10.1007/s11084-006-9053-2. PMID17136429.
Fischer, Emil (1884). “Ueber die Harnsäure. I.” [On uric acid. I.]. 《Berichte der Deutschen Chemischen Gesellschaft》 17: 328–338. doi:10.1002/cber.18840170196. From p. 329: "Um eine rationelle Nomenklatur der so entstehenden zahlreichen Substanzen zu ermöglichen, betrachte ich dieselben als Abkömmlinge der noch unbekannten Wasserstoffverbindung CH3.C5N4H3 and nenne die letztere Methylpurin." (In order to make possible a rational nomenclature for the numerous existing substances, I regarded them as derivatives of a still unknown hydrogen compound, CH3.C5N4H3, and call the latter "methylpurine".)
Fischer, Emil (1898). “Ueber das Purin und seine Methylderivate” [On purine and its methyl derivatives]. 《Berichte der Deutschen Chemischen Gesellschaft》 31 (3): 2550–2574. doi:10.1002/cber.18980310304. From p. 2550: "…hielt ich es für zweckmäßig, alle diese Produkte ebenso wie die Harnsäure als Derivate der sauerstofffreien Verbindung C5H4N4 zu betrachten, und wählte für diese den Namen Purin, welcher aus den Wörtern purum und uricum kombiniert war." (…I regarded it as expedient to consider all of these products, just like uric acid, as derivatives of the oxygen-free compound C5H4N4, and chose for them the name "purine", which was formed from the [Latin] words purum and uricum.)
Rosemeyer, Helmut (March 2004). “The Chemodiversity of Purine as a Constituent of Natural Products”. 《Chemistry & Biodiversity》 1 (3): 361–401. doi:10.1002/cbdv.200490033. PMID17191854.
Davies, O.; Mendes, P.; Smallbone, K.; Malys, N. (2012). “Characterisation of multiple substrate-specific (d)ITP/(d)XTPase and modelling of deaminated purine nucleotide metabolism”. 《BMB Reports》 45 (4): 259–264. doi:10.5483/BMBRep.2012.45.4.259. PMID22531138.
Choi, Hyon K.; Atkinson, Karen; Karlson, Elizabeth W.; Willett, Walter; Curhan, Gary (2004). “Purine-Rich Foods, Dairy and Protein Intake, and the Risk of Gout in Men”. 《New England Journal of Medicine》 350 (11): 1093–1103. doi:10.1056/NEJMoa035700. PMID15014182.
Saladino, Raffaele; Crestini, Claudia; Ciciriello, Fabiana; Costanzo, Giovanna; Mauro, Ernesto; 외. (2006). “About a Formamide-Based Origin of Informational Polymers: Syntheses of Nucleobases and Favourable Thermodynamic Niches for Early Polymers”. 《Origins of Life and Evolution of Biospheres》 36 (5–6): 523–531. Bibcode:2006OLEB...36..523S. doi:10.1007/s11084-006-9053-2. PMID17136429.
Sanchez, R. A.; Ferris, J. P.; Orgel, L. E. (1967). “Studies in prebiotic synthesis. II. Synthesis of purine precursors and amino acids from aqueous hydrogen cyanide”. 《Journal of Molecular Biology》 30 (2): 223–253. doi:10.1016/S0022-2836(67)80037-8. PMID4297187.