[1]TetrahedronLetters,1981,vol.22,p.2291-2294
[1]HelveticaChimicaActa,1985,vol.68,p.1961-1985
[1]TetrahedronLetters,1985,vol.26,p.4637-4638
[2]TetrahedronLetters,1981,vol.22,p.2291-2294
[1]TetrahedronLetters,1985,vol.26,p.4637-4638
[2]TetrahedronLetters,1985,vol.26,p.4637-4638
[1]TetrahedronLetters,1985,vol.26,p.4637-4638