Rodd's Chemistry of Carbon Compounds Vol.4 : Heterocyclic Compounds. Part L Fused-Ring Heterocyclic Compounds Containing Three or More Nitrogen Atoms ; Purines and Related Ring Systems, Nucleosides, Nucleotides and Nucleic Acids ; Pteridines, Alloxazines, Flavins and Related Compounds. The Biosynthesis of Plant Alkaloids and Nitrogenous Microbial Metabolites A Modern Comprehensive Treatise