环加成反应是最高效的化学转化之一,可以在一步反应中形成多个碳-碳键或碳-杂原子键。本论文利用[4+2]和[5+2]环加成策略对具有独......

　　Paeoveitol,a pair of norditerpene enantiomers,were isolated by Chen from the root of Paeonia veitchii (Chuan-Chi-Sha......