[1]TetrahedronLetters,1992,vol.33,p.1941-1944
[1]TetrahedronLetters,1992,vol.33,p.1941-1944
[2]TetrahedronLetters,1992,vol.33,p.1941-1944
[1]TetrahedronLetters,1992,vol.33,p.1941-1944
[1]TetrahedronLetters,1992,vol.33,p.1941-1944
[1]TetrahedronLetters,1992,vol.33,p.1941-1944