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[1]HelveticaChimicaActa,1925,vol.8,p.554
[2]HelveticaChimicaActa,1925,vol.8,p.554
[1]HelveticaChimicaActa,1925,vol.8,p.551
[1]Chemistry-AEuropeanJournal,2000,vol.6,p.1318-1321