Two new tocopherol polymers from the seeds of Euryale ferox

Abstract

Two new tocopherol polymers, chroman-type dimer named ferotocodimer A (1) and spiro-type trimer named ferotocotrimer E (2), were isolated from the seeds of Euryale ferox. Their structures were elucidated on the basis of spectroscopic methods including HR-ESI-MS and 1D and 2D NMR. The absolute configurations of 1 and 2 were determined by CD and ROESY experiments.

Keywords:

• Euryale ferox
• tocopherol polymer
• ferotocodimer A
• ferotocotrimer E

Acknowledgments

This research work was financially supported by the Key Project of National Natural Science Foundation of China (Grant No. 30830116) and Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT-IRT1193).