Shkurko, O. P. published the artcileSubstituent effects on the amino-group chemical shifts in NMR spectra of substituted aminopyridines, Formula: C6H8N2, the publication is Khimiya Geterotsiklicheskikh Soedinenii (1990), 54-9, database is CAplus.
Correlation analyses are presented for amino-group proton chem. shifts in m– and p-substituted (with respect to the amino group) 2-, 3-, and 4-aminopyridines (6 series altogether) using inductive and resonant substituent constants
Khimiya Geterotsiklicheskikh Soedinenii published new progress about 18437-58-6. 18437-58-6 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 4-Amino-2-picoline, and the molecular formula is C7H5ClN2S, Formula: C6H8N2.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem