[1]JournaloftheAmericanChemicalSociety,1948,vol.70,p.2115,2116 Org.Synth.Coll.Vol.,1963,vol.IV,p.588
[2]PharmaceuticalChemistryJournal,1988,vol.22,p.401-402 Khimiko-FarmatsevticheskiiZhurnal,1988,vol.22,p.591-592
[1]JournaloftheAmericanChemicalSociety,1958,vol.80,p.5880,5884
[1]PharmaceuticalChemistryJournal,1980,vol.14,p.60-63 Khimiko-FarmatsevticheskiiZhurnal,1980,vol.14,p.73-75
[2]ZeitschriftfurNaturforschung,1947,vol.2b,p.186
[3]PharmaceuticalChemistryJournal,1988,vol.22,p.401-402 Khimiko-FarmatsevticheskiiZhurnal,1988,vol.22,p.591-592
[1]Chemicalandpharmaceuticalbulletin,1987,vol.35,p.357-363
[1]GazzettaChimicaItaliana,1985,vol.115,p.325-328