SEARCH Articles Figures Tables From a Pyridine Substrate and Synthon(s) From a Pyridine Substrate and Two Synthons From a Pyridine Substrate with One Synthon From a Pyridine Substrate with Two or More Synthons From a Single Pyridine Substrate Naphthyridines by Cyclization of Pyridine Substrates Naphthyridines by Cyclocondensation of Pyridine Substrates with Synthons Pyridine carbohydrate substrates Pyridine, adsorption substrate structure Pyridines as Substrates