al·lo·pu·ri·nol 
(ăl′ō-pyrə-nôl′, -nōl′, -nŏl′)
(ăl′ō-pyrə-nôl′, -nōl′, -nŏl′)n.
A drug, C5H4N4O, that inhibits uric acid formation in the body and is used to treat conditions, especially gout, that cause elevated uric acid levels.
[ALLO- + PURIN(E) + -OL2.]