S. Masiero et al., The synthesis and preferred conformation of pyridoyl urea and analogous derivatives: Preparation of a folate analogue, J CHEM R-S, (10), 1998, pp. 634-635
The synthesis of 2-pyridoyl urea and analogous derivatives is reported, NMR
spectra show that the acylureas adopt an intramolecular H-bonded conformat
ion.