Phytochemical Constituents, Total Saponins, Alkaloids, Flavonoids and Vitamin C Contents of Ethanol Extracts of five Solanum torvum Fruits, Koomson, Desmond Ato, Kwakye Benjamin Danso, Darkwah Williams Kweku, Odum Bismark, Asante Mabel, and Aidoo Gideon , Pharmacognosy Journal, August 2018, Volume 10, Issue 5, p.946-950, (2018)