Finally, there are some rare stones made of xanthine, which, just like uric acid, is a byproduct of purine breakdown.

最后，还有由黄嘌的罕见结石，同尿酸一样，是嘌分解的副产。

Xanthine oxidase is an enzyme involved in the breakdown of purines to uric acid, so inhibiting this enzyme results in less uric acid production.

黄嘌氧化酶负责分解嘌为尿酸，所这个酶，就可减少尿酸的生。

There are also medications that help to decrease uric acid levels, which include xanthine oxidase inhibitors like allopurinol.

也有一些药可帮助降低尿酸含量，包括黄嘌氧化酶剂，如别嘌醇。