Allopurinol.
D000493:Allopurinol / Q000494:pharmacology*; D003864:Depression, Chemical; D006801:Humans; D011686:Purine-Pyrimidine Metabolism, Inborn Errors / Q000378:metabolism; D011743:Pyrimidines / Q000096:biosynthesis*
D011743:Pyrimidines; D000493:Allopurinol