Oleanane-type triterpenes from Ludwigia octovalvis

Abstract

Two new oleanane-type triterpenes, (23Z)-feruloylhederagenin (1) and (23E)-feruloylhederagenin (2), together with two known oleanane-type triterpenes, β-amyrin acetate and β-amyrin palmitate, have been isolated from the whole plant of Ludwigia octovalvis. The structures of 1 and 2 were characterised on the basis of spectral evidence.

Keywords:

• Ludwigia octovalvis
• Onagraceae
• Triterpenes
• (23Z)-Feruloylhederagenin
• (23E)-Feruloylhederagenin

Acknowledgements

This research was supported by grants from the National Science Council of China. We thank Ms. Shou-Ling Huang and Shu-Yun Sun for the NMR data acquisition and HREI-MS measurements in the Instrumentation Centre of the College of Science, National Taiwan University.