Cite

    T. A. Alanine et al.. “Concise synthesis of rare pyrido[1, 2-a]pyrimidin-2-ones and related nitrogen-rich bicyclic scaffolds with a ring-junction nitrogen.” Organic & biomolecular chemistry, vol. 14, no. 3, 2016, pp. 1031–1038. http://access.bl.uk/ark:/81055/vdc_100030534669.0x00000c