Cumper, C. W. N. published the artcileThe ultraviolet spectra of aniline, 2-, 3-, and 4-aminopyridines, and of some of their derivatives in n-hexane, 1,4-dioxane, ethanol, and water solutions, Category: pyridine-derivatives, the publication is Journal of the Chemical Society [Section] B: Physical Organic (1968), 649-51, database is CAplus.
The uv spectra of aniline, 2-, 3-, and 4-aminopyridines, and certain of their derivatives have been determined in hexane, 1,4-dioxane, EtOH, and water solutions N-Methylation of the amino group increases its electron-donating ability and the introduction of a Me group or halogen atom into the Ph or pyridyl ring also produces a bathochromic shift. In dioxane and EtOH solutions the amine forms H bonds to the solvent; this also occurs with 4-aminopyridines in water; with the other solutes H bonding by the water predominates.
Journal of the Chemical Society [Section] B: Physical Organic 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 C6H8N2, Category: pyridine-derivatives.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem