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

最后，还有由黄嘌形成的罕，同酸一样，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酸，所以抑制这个酶，就可以减少酸的生成。

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

也有一些药可以帮助降低酸含量，包括黄嘌氧化酶抑制剂，如别嘌醇。