Also known as 4′-HPP, 4-HPP, 4-Hydroxypyrazolopyrimidine, AL-100, Allopurinolum, Alopurinol, Lopurin, Sigapurol, Zurinol, Zyloprim (tn) A structural isomer of hypoxanthine. Allopurinol inhibits xanthine oxidase, an enzyme that converts oxypurines to uric acid....
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