2.1. Plant material and extraction procedure
C. cassia (the stem bark of Chinese cinnamon)
was obtained from commercial sources. Twenty
grams of the cinnamon dry bark were ground to a
fine powder: 10 g of the powdered bark were
extracted with 100 ml ethanol (95%) (a) and the
other 10 g with 100 ml methylene chloride (b).
The suspensions were mixed for 24 h at room
temperature on a rotatory shaker (100–120
rpm), and filtered through a Whatman No. 1
filter.