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Amaryllidaceae is a well-known family for its high alkaloidal content. These alkaloids comprise a unique group of bases that have been found to occur in this family. The Amaryllidaceae alkaloids represent a large and still expanding group of isoquinoline alkaloids, the majority of which are not known to occur in any other family of plants. This article reports on the phytochemical investigation of the alkaloidal content of the flowers of clivia nobilis cultivated in Egypt which resulted in the isolation of four alkaloids; lycorine with pyrrolo{de}phenanthridine nucleus (lycorine-type) which is the common alkaloid of the amaryllidaceae family, clivatine and nobilisine, both with [2]benzopyrano (3,4-g) indole nucleus (lycorenine-type) and (+) 8-O-demethylmaritidine with 5,10b-ethanophenanthridine nucleus (crinine-type). Furthermore, the antimicrobial activity of the chloroform extract of the flowers of c. nobilis along with some of the isolated alkaloids has been studied.

A phytochemical investigation of the bulbs and flowers of Hymenocallis littoralis SALISB., cultivated in Egypt, was carried out, which resulted in the isolation of four alkaloids, lycorine (1), hippeastrine (2), 11-hydroxyvittatine (3), and (+)-8-O-demethylmaritidine (4), and of two flavonoids, quercetin 3'-O-glucoside (5), and rutin (6). The volatile constituents of the plant flowers were analyzed for the first time by GC/MS, which led to the identification of 26 known compounds (Table 1). Finally, the antimicrobial activity of the petroleum ether extract of the flowers of H. littoralis was investigated.

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Alkaloids U 0600 Two New Alkaloids from Bulbs of Lycoris squamigera -[isolation and structure determination of new crinine-type alkaloid, squamigine (I), and norbelladine-type alkaloid (II)]. -(KITAJIMA, M.; KINOSHITA, E.; KOGURE, N.; TAKAYAMA*, H.; Heterocycles 77 (2009) 2, 1389-1396; Grad. Sch. Pharm. Sci., Chiba Univ., Inage, Chiba 263, Japan; Eng.) -M. Bohle 27-185