![On the site of protonation of the 2-aminoimidazo[5,1-f][1,2,4]triazine system: X-ray, 13C nuclear magnetic resonance, and CNDO/2 studies]()
On the site of protonation of the 2-aminoimidazo[5,1-f][1,2,4]triazine system: X-ray, 13C nuclear magnetic resonance, and CNDO/2 studiesRiley, J. Patrick; Heatley, Frank; Hillier, Ian H.; Murray-Rust, Peter; Murray-Rust, Judith · Journal of the Chemical Society, Perkin Transactions 2 · 1979