Dried CM flowers were washed three times with distilled
water to remove dirt and soil. Next, 20 grams of flowers were
immersed in 300 mL boiling distilled water for 10 minutes.
The cooled filtrate obtained was stored at 4°C for further
use. The 50 mL of AgNO3 (2 mmol/L) aqueous solution was
reacted with 50 mL drops of the obtained extract solutions
in a flask with stirring for 30 minutes and then continued
stirring for 24 hours at room temperature