The separation
of the ethylacetate extract of B. balsamifera DC leaves
afforded 9 flavonoids including dihydroflavonols (1 and
2), flavanones (3 and 4), flavonols (5-7) and flavones (8
and 9). Separation of ethylacetate extract was achieved
by column chromatography on silica gel and sephadex
LH-20. Structures of the isolated compounds were
identified by spectroscopic method including UV, 1H
NMR, 13C NMR, HMQC, HMBC and MS data and also