Homoerythrina alkaloids biosynthesis

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... 

Homoaerothionin, biosynthesis of 1315, 1316 HomocaUxarenes, synthesis of 1376-1381 Homoerysodienones, formation of 1297 B-Homoerythrina alkaloids 1297 synthesis of 1300 Honey, analysis of 961, 973 Horseradish peroxidase 974, 977, 978, 981 as oxidation catalyst 1216, 1217, 1219-1221, 1224, 1225 HPLC, normal phase 953 H-point standard additions method 954 HSZ-360 catalyst 680 Hydrocarbons, aromatic,... 

Biosynthesis The concomitant occurrence of C. a. and homoerythrina alkaloids indicates a common biosynthesis. Both types of alkaloids are derived from 1-phenethylisoquinoline with (see phenethyltetrahydroi-soquinoline alkaloids) ring A originating from tyrosine and ring B from phenylalanine. The acid components, e. g., harringtonic, isoharringtonic, and deoxyharring-tonic acids are derived from leucine. 

Fig. 5.2.13. Proposed biosynthesis of Cephalotaxus and homoerythrina-type alkaloids...

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