Described herein are compounds that have a spiro structural feature.
本说明书描述了具有螺环结构特征的化合物。
2
The expected adduct 100 was not stable and appeared to undergo further reaction to the spiro intermediate 101.
由于所期待的加成物（100）不稳定，它经过进一步的反应，就产生螺环中间体。
3
The spiro compounds containing indole moiety which have significant physiological and biological activity are widely existed a variety of natural products.