[1]Heterocycles,1992,vol.34,#4,p.739-745
[2]ChemischeBerichte,1981,vol.114,#3,p.990-993
[3]JournalofOrganicChemistry,1965,vol.30,p.1945-1951
[1]ChemischeBerichte,1981,vol.114,#3,p.990-993
[2]Heterocycles,1992,vol.34,#4,p.739-745
[1]Heterocycles,1992,vol.34,#4,p.739-745
[1]JournalofOrganicChemistry,1965,vol.30,p.1945-1951
[1]JournalofOrganicChemistry,1965,vol.30,p.1945-1951
[1]JournalofOrganicChemistry,1965,vol.30,p.1945-1951
[1]JournalofOrganicChemistry,1965,vol.30,p.1945-1951
[1]ChemischeBerichte,1981,vol.114,p.990-993
[1]ChemischeBerichte,1981,vol.114,p.990-993
[2]Heterocycles,1992,vol.34,p.739-745