烷基自由基对羰基进行进攻，生成双环的羰自由基中间体。

This radical attacks the carbonyl group to an intermediate bicyclic ketyl.

youdao

烷基自由基对羰基进行进攻，生成双环的羰自由基中间体。

This radical attacks the carbonyl group to an intermediate bicyclic ketyl.

youdao