Shkurko, O. P. published the artcileNMR spectra of pyrimidines. Effect of substituents on the chemical shift of meta-protons in 2- and 4-substituted pyrimidines, Product Details of C6H9N3, the publication is Khimiya Geterotsiklicheskikh Soedinenii (1978), 673-7, database is CAplus.
NMR chem. shifts were recorded for H-4 in I (R = Me2N, MeO, Me, Ph, H, halo, CO2Me, MeSO2, CN) and for H-2 and H-6 in II (same R), and correlation equations with F and R substituent constants were obtained. The inductive effect of R was weaker when R and the observed H were separated by a ring N.
Khimiya Geterotsiklicheskikh Soedinenii published new progress about 31401-45-3. 31401-45-3 belongs to pyrimidines, auxiliary class Pyrimidine,Amine, name is N,N-Dimethylpyrimidin-4-amine, and the molecular formula is C39H35N5O8, Product Details of C6H9N3.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia