Abstract
Two novel rearrangement products of the degradated derivative of maoecrystal A (1), an ent-kaurane-type diterpene via a Wagner–Meerwein process, have been reported.
Acknowledgements
Financial support for this research was provided by the National Natural Science Foundation of China (No. 0040505401008). The authors also acknowledge with thanks the help of Professor Han-Dong Sun, Kumming Institution of Botany, Chinese Academy of Sciences, in the collection and extraction of the plant (Isodon eriocalyx) materials.