[1]Heterocycles,1992,vol.34,#9,p.1759-1771
[2]ChemischeBerichte,1901,vol.34,p.3263
[1]Heterocycles,1992,vol.34,p.1759-1771
[2]ChemischeBerichte,1901,vol.34,p.3263
[1]JournaloftheChemicalSociety,1959,p.3789,3794
[1]PharmaceuticalChemistryJournal,1972,vol.6,p.207-211 Khimiko-FarmatsevticheskiiZhurnal,1972,vol.6,p.13-17
[1]ChemicalandPharmaceuticalBulletin,1985,vol.33,p.3540-3544
[1]Heterocycles,1992,vol.34,p.1759-1771