Preparation of Boletus griseipurpureus Corner. ExtractBoletus griseipurpureus Corner specimens were acquired from the Faculty of Natural Resources at Prince of Songkla University (Collection No. BGC-2566-01), where they had already been morphologically identified. The specimens were rinsed with tap water, drained, crushed thoroughly, then macerated with 95% ethanol in a 4:1 ratio for three days. The process was repeated two times. The extract was filtered using cotton cloth, followed by filter paper no. 1, and then evaporated using an evaporation machine