The results indicate that in all reactions, the OH radical additions to the C4, C5, and C8 sites are thermodynamically and kinetically more favorable than the others.

• 计算表明，在?OH自由基与腺嘌呤的反应中，?OH自由基攻击腺嘌呤C4、C5和C8位置的反应几率大于别的反应。