2. A synthetic purine nucleoside analog, C8H10N5O3, derived from guanine and used topically in the treatment of herpes simplex infections, especially such infections of the genitals.

• 合成嘌呤核苷类似物一种合成嘌呤核苷类似物，化学式为C8H10N5O3，来源于鸟嘌呤，部分用于疱疹单一性感染的治疗，尤指用于对生殖器感染的治疗收藏指正