Abstract
Crinum jagusis a medicinal species of botanical family Amaryllidaceae, widely used in traditional medicine. In present investigation on total alkaloid extracts from leaves, bulbs and roots, the objective was to highlight qualitative and quantitative composition of alkaloids and to determine their antioxidant capacity toward DPPH compared to vitamin C. Qualitative analyses showed in addition and independently of alkaloids, the presence of coumarins and terpenes. DPPH test demonstrated that the total alkaloid extract from Crinum jagusbulbs has a very significant in vitroantioxidant activity with regard to its median DPPH reduction concentration (CR50= 0.026 mg/ml). Alkaloid content estimated of 1.468 ± 0.026 % proves that Crinum jagusbulbs constitute a reservoir of alkaloids.