[1]TetrahedronLetters,1985,vol.26,p.3423-3426
[1]TetrahedronLetters,1985,vol.26,p.3423-3426
[1]TetrahedronLetters,1985,vol.26,p.3423-3426
[1]JournalofOrganicChemistry,1987,vol.52,p.2714-2726
[1]JournaloftheChemicalSociety.Chemicalcommunications,1983,p.748-750
[2]JournaloftheChemicalSociety.Chemicalcommunications,1983,p.748-750