Iridoid glucosides from leaves and stem barks of Parkia javanica

Abstract

Two new iridoid glucosides, javanicosides A (1) and B (2) along with the known compounds, ursolic acid and β-sitosterol were isolated from the leaf and stem bark of Parkia javanica and the structures were established on the basis of detailed spectroscopic analysis (MS, 1D, and 2D NMR experiments). The new compounds were identified as 8-O-p-hydroxybenzoyl-6′-O-p-coumaroyl-mussaenosidic acid (1) and 7-O-E-3,4-dimethoxycinnamoyl-6′-O-β-d-glucopyranosylloganic acid (2).

Keywords:

• Parkia javanica
• Mimosaceae
• iridoid glucosides

Acknowledgements

The authors are grateful to Prof. B.C. Ranu, IACS, Kolkata, for IR spectra; Dr B.K. Datta, Department of Botany, Tripura University, for identification of plant material and to University Grants Commission, New Delhi for financial support (vide Grant No. 31-127/2005).