| Answer | Crossword Clue |
|---|---|
| xanthine | crystalline, nitrogenous compound, C5H4N4O2, related to uric acid, occurring in urine, blood, and certain animal and vegetable tissues |
| xanthines | A crystalline compound that is found in blood and urine and is an intermediate in the metabolic breakdown of nucleic acids to uric acid |
| xanthins | A crystalline compound that is found in blood and urine and is an intermediate in the metabolic breakdown of nucleic acids to uric acid |
