The plant bark was cleaned and shade dried. The dried plant bark was ground into fine powder. The extraction was done by cold maceration process using methanol solvent in closed vessel for three days at room temperature. The extract was collected. This process was repeated three times consecutively. The extract was filtered using Whatman filter paper No. 1. The filtered extract was dried under reduced pressure at room temperature below 40oC using rotary evaporator (BIOBASE RE-2000B Rotary Evaporator, China) and then, by using freeze dryer or lyophilizer. Then, the extract was stored in closed vials at 4oC for further analysis.

The plant bark was cleaned and shade dried. The dried plant bark was ground into fine powder. The extraction was done by cold maceration process using methanol solvent in closed vessel for three days at room temperature. The extract was collected. This process was repeated three times consecutively. The extract was filtered using Whatman filter paper No. 1. The filtered extract was dried under reduced pressure at room temperature below 40oC using rotary evaporator (BIOBASE RE-2000B Rotary Evaporator, China) and then, by using freeze dryer or lyophilizer. Then, the extract was stored in closed vials at 4oC for further analysis.