Unambiguous structure determination of some pyrazolo [1,5-a]pyrimidine derivatives by multinuclear NMR spectroscopy
Stefano Chimichi, Barbara Cosimelli, Fabrizio Bruni, Silvia Selleri.
Magnetic Resonance in Chemistry
Volume 30 Issue 11, Pages 1117 - 1121
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http://dx.doi.org/10.1002/mrc.1260301116