Flavonoids: The alcoholic extract (0.5 g)
was treated with a few drops of concentrated
HCl and magnesium turnings (100 mg).The
presence of flavonoids was indicative if pink
or magenta-red color developed within 3 min.
A pink or red color developed which could be
extracted with amyl alcohol. The presence of
flavonoids was (+1) – (+4) numeric