The leaves of Madhuca indica were collected from Comilla district, Bangladesh in August, 2009. The
plant was taxonomically identified by the Bangladesh National Herbarium at Dhaka. The leaves of Madhuca
indica were air-dried in the shade for 120 hours, grounded into a fine powder, and were extracted with
methanol at a ratio of 1:5 (w/v). After 24 hrs, the mixture was filtered; filtrate was collected and the residue
was again extracted with methanol at a ratio of 1:3 (w/v) for 24 hrs. Filtrates were combined and evaporated
to dryness. The initial weight of dried leaf powder used for extraction was 100g; the final weight of the extract
was 7.3g. The stems of Paederia foetida were collected from Dhaka during June, 2010. Stems were sliced into
small pieces and air-dried in the shade for 120 hours. Methanol extraction of stems was done as described
before for leaves of Madhuca indica. The initial weight of dried stem powder used for extraction was 100g;
the final weight of the extract was 6.8g.