| Synonyms: | Pyridinebases;Pyridines,polyalkylated,higherboilingfraction;polyalkylatedpyridines;Pyridine,alkylderivs.;Pyridines,polyalkylated,lowerboilingfraction;Pyridines,polyalkylated:polyalkylatedpyridines;PAP-220;Pyridine, alkyl derivs. Crude Tar Bases [The complex combination of polyalkylated pyridines derived from coal tar distillation or as high-boiling distillates approximately above 150°C (302°F) from the reaction of ammonia with acetaldehyde, formaldehyd |