Chemical and Pharmaceutical Bulletin, cilt.55, sa.4, ss.643-645, 2007 (SCI-Expanded)
Purification of a Microdesmis keayana hydromethanolic root extract led to the isolation of two new natural compounds, xanthoquininamide (6-hydroxyquinoline-4-carboxamide) and tris(4-hydroxycinnamoyl)spermine (N 5-(p-coumaroyl)-N1,N14-diferuloylspermine) which was named keayanine. Their structures were determined using spectroscopic analyses (ESI-MS, 1D- and 2D-NMR). © 2007 Pharmaceutical Society of Japan.