[1]JournaloftheAmericanChemicalSociety,1957,vol.79,p.170,172
[1]JournaloftheAmericanChemicalSociety,1957,vol.79,p.170,172
[1]JournaloftheAmericanChemicalSociety,1957,vol.79,p.705,707
[1]Patent:US3989746,1976,A
[2]Patent:DE2323956,1973, Chem.Abstr.,1974,vol.80
[1]Tetrahedron,1996,vol.52,p.4423-4432