ON THE STRUCTURES OF SIX NEW DITERPENOIDS, TAXCHININS E, H, I, J, K AND TAXCHIN B

The structures of taxchinin E, H, I, J, K and taxchin B, isolated from Taxus chinensis, have been elucidated by means of NMR spectroscopy. The former five possess a rearranged taxoid skeleton, and the latter has an ordinary taxane framework.