SEARCH Articles Figures Tables A-Cyanoketones pyrimidine ring, 4-amino Annelation of a pyrimidine ring Annelation of a pyrimidine ring to an existing Aspartate pyrimidine ring Conformational Flexibility of Pyrimidine Ring in Nucleic Acid Bases Construction of the Pyrimidine Ring Five-membered-ring fused pyrimidines Formamide pyrimidine ring Guanidine pyrimidine ring Hermecz, I., Vasvari-Debreczy, L., Tricyclic Compounds with a Central Pyrimidine Ring Imidazole 3-oxide ring from pyrimidines) Isothiocyanates pyrimidine ring Lactones pyrimidine ring Nucleic acid bases , pyrimidine ring Nucleic acid bases , pyrimidine ring flexibility Nucleic acid bases , pyrimidine ring imidazole rings Nucleobases pyrimidine ring O-Aminonitriles pyrimidine ring Perhydropyrido pyrimidine, ring Pteridine ring pyrimidines, 4-amino5-nitroso- and enamine Pterins pyrimidine ring formation Pyrazolo pyrimidine ring Pyrido pyrimidines ring transformations Pyrimidine 4- amino-5-cyano-2-methyl-, ring Pyrimidine Ring Substitution Pyrimidine ring amides Pyrimidine ring annelation to an existing Pyrimidine ring annellation Pyrimidine ring assembly of, scheme Pyrimidine ring cleavage Pyrimidine ring construction Pyrimidine ring contributors Pyrimidine ring electronic density Pyrimidine ring formation Pyrimidine ring fully substituted Pyrimidine ring nitriles Pyrimidine ring, biosynthesis Pyrimidine ring, opening, review Pyrimidine ring, tricyclic compounds with Pyrimidine ring, tricyclic compounds with a central Pyrimidine ring, tricyclic compounds with central Pyrimidine-2-amines, ring atom Pyrimidine-2-amines, ring atom substitution Pyrimidine-pyridine ring interconversion Pyrimidines and their Fused Ring Systems Pyrimidines pteridine ring Pyrimidines ring synthesis Pyrimidines, -fused, ring-opening Pyrimidines, fused ring systems Pyrrolo pyrimidine ring Pyrrolo pyrimidine ring synthesis Ring vibrations pyrimidine Ring-saturated pyrimidine derivatives Six-membered rings pyrimidine Substituted pyrimidines, pyrimidine ring Thiourea pyrimidine ring Three-bond formation, pyrimidine ring Tricyclic compounds with a central pyrimidine ring and Tricyclic compounds with a central pyrimidine ring and one bridgehead Tricyclic compounds with a central pyrimidine ring and one bridgehead nitrogen