Paudler, William W. published the artcileSkraup synthesis and nuclear magnetic resonance spectra of some methylnaphthyridines, Recommanded Product: 2,7-Dimethyl-1,8-naphthyridine, the publication is Journal of Heterocyclic Chemistry (1967), 4(2), 284-9, database is CAplus.
Some mono- and dimethylnaphthyridines were prepared by the application of the Skraup reaction to various 2- and 4-aminopyridines. The proton N.M.R. spectral data assignments are reported. The chem. shifts of the Me protons are calculated
Journal of Heterocyclic Chemistry published new progress about 14903-78-7. 14903-78-7 belongs to naphthyridine, auxiliary class 6.6_Aromatics,Naphthyridines, name is 2,7-Dimethyl-1,8-naphthyridine, and the molecular formula is C10H10N2, Recommanded Product: 2,7-Dimethyl-1,8-naphthyridine.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem