[1]
I. V. Ukrainets, N. L. Bereznyakova, K. A. Taran, and O. O. Davidenko, “Improved synthesis, spectral characteristics and spatial structure of ethyl 2-hydroxy-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate”, J. Org. Pharm. Chem., vol. 12, no. 3(47), pp. 23–27, Sep. 2014.