Alkaloids Derived from Both Tyrosine and Phenylalanine

Alkaloids Derived from Both Tyrosine and Phenylalanine 

Biological Activity of Colchicine Medicinal Uses of Colchicine Use of Colchicine in Horticulture Amaryllidaceae Alkaloids Biosynthesis Biological Activity 

Medicinal Uses of Amaryllidaceae Alkaloids Mesembryanthemum and Sceletium Alkaloids Cephalotaxus and Homoerythrina Alkaloids Biosynthesis of Cephalotaxus Alkaloids Biosynthesis of Homoerythrina Alkaloids Systematic Value of Cephalotaxus and Homoerythrina Alkaloids 

The biosynthesis of several types of alkaloids involves both phenylalanine and tyrosine. These alkaloids occur in the closely related families Amaryllidaceae and Liliaceae and in the Cephalotaxaceae and Mesembryanthemaceae. The last two families are not closely related to each other, nor to the first two families. 

Both the H- and C-NMR (nuclear magnetic resonance) spectra for several of these alkaloids have been reviewed (Crabb, 1982). The results of feeding experiments leading to colchicine, Amaryllidaceae, and Cephalotaxus alkaloids have been tabulated (Leete, 1983). 

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